Your task in order to complete this Kata is to write a function which formats a duration, given as a number of seconds, in a human-friendly way.

The function must accept a non-negative integer. If it is zero, it just returns `"now"`. Otherwise,  the duration is expressed as a combination of `years`, `days`, `hours`, `minutes` and `seconds`.

It is much easier to understand with an example:

```Fortran
formatDuration (62)    // returns "1 minute and 2 seconds"
formatDuration (3662)  // returns "1 hour, 1 minute and 2 seconds"
```
```python
format_duration(62)    # returns "1 minute and 2 seconds"
format_duration(3662)  # returns "1 hour, 1 minute and 2 seconds"
```

**For the purpose of this Kata, a year is 365 days and a day is 24 hours.**

Note that spaces are important.

### Detailed rules

The resulting expression is made of components like `4 seconds`, `1 year`, etc.  In general, a positive integer and one of the valid units of time, separated by a space. The unit of time is used in plural if the integer is greater than 1.

The components are separated by a comma and a space (`", "`). Except the last component, which is separated by `" and "`, just like it would be written in English. 

A more significant units of time will occur before than a least significant one. Therefore, `1 second and 1 year` is not correct, but `1 year and 1 second` is.

Different components have different unit of times. So there is not repeated units like in `5 seconds and 1 second`.

A component will not appear at all if its value happens to be zero.  Hence, `1 minute and 0 seconds` is not valid, but it should be just `1 minute`.

 A unit of time must be used "as much as possible". It means that the function should not return `61 seconds`, but `1 minute and 1 second` instead.  Formally, the duration specified by  of a component must not be greater than any valid more significant unit of time.

Difficulty: interview

Starter code:

def format_duration(seconds):
	

Solutions:
times = [("year", 365 * 24 * 60 * 60), 
         ("day", 24 * 60 * 60),
         ("hour", 60 * 60),
         ("minute", 60),
         ("second", 1)]

def format_duration(seconds):

    if not seconds:
        return "now"

    chunks = []
    for name, secs in times:
        qty = seconds // secs
        if qty:
            if qty > 1:
                name += "s"
            chunks.append(str(qty) + " " + name)

        seconds = seconds % secs

    return ', '.join(chunks[:-1]) + ' and ' + chunks[-1] if len(chunks) > 1 else chunks[0]


def format_duration(seconds):
    if seconds == 0: return "now"
    units = ( (31536000, "year"  ), 
              (   86400, "day"   ),
              (    3600, "hour"  ),
              (      60, "minute"),
              (       1, "second") )
    ts, t = [], seconds
    for unit in units:
        u, t = divmod(t, unit[0])
        ts += ["{} {}{}".format(u, unit[1], "s" if u>1 else "")] if u != 0 else []
    return ", ".join([str(d)for d in ts[:-1]]) + (" and " if len(ts)>1 else "") + ts[-1]

def f(n, unit):
    return [', ', '{} {}{}'.format(n, unit, 's' if n > 1 else '')]

def format_duration(seconds):
    if not seconds: return 'now'

    minutes, seconds = divmod(seconds, 60)
    hours, minutes = divmod(minutes, 60)
    days, hours = divmod(hours, 24)
    years, days = divmod(days, 365)

    fs = []
    if years: fs.extend(f(years, 'year'))
    if days: fs.extend(f(days, 'day'))
    if hours: fs.extend(f(hours, 'hour'))
    if minutes: fs.extend(f(minutes, 'minute'))
    if seconds: fs.extend(f(seconds, 'second'))

    fs[-2] = ' and '
    fs.pop(0)
    return ''.join(fs)

def format_duration(seconds):
      if seconds==0:
       return "now"
      #if seconds==132375840:
          #return '4 years, 68 days, 3 hours and 4 minutes'
      minu, sec = divmod(seconds, 60) 
      hour, minu = divmod(minu, 60)
      day,hour=divmod(hour,24)
      year,day=divmod(day,365)
      if year==0:
        if day==0:
            if hour==0:
               if minu==0:
                    if sec==1:
                        return str(sec)+' second'
                    return str(sec)+' seconds'
               if minu==1:
                    if sec==0:
                        return str(minu)+' minute'
                    if sec==1:
                        return str(minu)+' minute and '+str(sec)+' second'
                    return str(minu)+' minute and '+str(sec)+' seconds' 
               if minu>1:
                    if sec==0:
                        return str(minu)+' minutes'
                    if sec==1:
                        return str(minu)+' minutes and '+str(sec)+' second'
                    return str(minu)+' minutes and '+str(sec)+' seconds' 
                   
            if hour==1:
               if minu==0:
                   if sec==0:
                        return str(hour)+' hour'
                       
                   if sec==1:
                        return str(hour)+' hour and '+str(sec)+' second'
                   return str(hour)+' hour and '+str(sec)+' seconds'
               if minu==1:
                   if sec==0:
                       return str(hour)+' hour, '+str(minu)+' minute'
                       
                   if sec==1:
                        return str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' seconds' 
               if sec==0:
                   return str(hour)+' hour, '+str(minu)+' minutes'
                   
               if sec==1:
                    return str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' second'
               return str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' seconds' 
            if hour>1:
                if minu==0:
                   if sec==0:
                       return str(hour)+' hours'
                       
                   if sec==1:
                        return str(hour)+' hours and '+str(sec)+' second'
                   return str(hour)+' hours and '+str(sec)+' seconds'
                if minu==1:
                   if sec==0:
                        return str(hour)+' hours and '+str(minu)+' minute'
                        
                   if sec==1:
                        return str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' seconds' 
                if minu>1:
                    if sec==0:
                        return str(hour)+' hours and '+str(minu)+' minutes'
                        
                    if sec==1:
                        return str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' second'
                    return str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' seconds' 
                    
                
        if day==1:
            if hour==0:
               if minu==0:
                    if sec==0:
                        return str(day)+' day'
                    if sec==1:
                        return str(day)+' day and '+str(sec)+' second'
                    return str(day)+' day and '+str(sec)+' seconds'
               if minu==1:
                    if sec==0:
                        return str(day)+' day and '+str(minu)+' minute'
                    if sec==1:
                        return str(day)+' day, '+str(minu)+' minute and '+str(sec)+' second'
                    return str(day)+' day, '+str(minu)+' minute and '+str(sec)+' seconds' 
               if minu>1:
                    if sec==0:
                        return str(day)+' day and '+str(minu)+' minutes'
                    if sec==1:
                        return str(day)+' day, '+str(minu)+' minutes and '+str(sec)+' second'
                    return str(day)+' day, '+str(minu)+' minutes and '+str(sec)+' seconds' 
                   
            if hour==1:
               if minu==0:
                   if sec==0:
                        return str(day)+' day and '+str(hour)+' hour and '+str(sec)
                       
                   if sec==1:
                        return str(day)+' day, '+str(hour)+' hour and '+str(sec)+' second'
                   return str(day)+' day, '+str(hour)+' hour and '+str(sec)+' seconds'
               if minu==1:
                   if sec==0:
                       return str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minute'
                       
                   if sec==1:
                        return str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' seconds' 
               if sec==0:
                   return str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minutes'
                   
               if sec==1:
                    return str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' second'
               return str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' seconds' 
            if hour>1:
                if minu==0:
                   if sec==0:
                       return str(day)+' day and '+str(hour)+' hours'
                       
                   if sec==1:
                        return str(day)+' day, '+str(hour)+' hours and '+str(sec)+' second'
                   return str(day)+' day, '+str(hour)+' hours and '+str(sec)+' seconds'
                if minu==1:
                   if sec==0:
                        return str(day)+' day, '+str(hour)+' hours and '+str(minu)+' minute'
                        
                   if sec==1:
                        return str(day)+' day, '+str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(day)+' day, '+str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' seconds' 
                if minu>1:
                    if sec==0:
                        return str(day)+' day, '+str(hour)+' hours and '+str(minu)+' minutes'
                        
                    if sec==1:
                        return str(day)+' day, '+str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' second'
                    return str(day)+' day, '+str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' seconds' 
        if day>1:
            if hour==0:
               if minu==0:
                    if sec==0:
                        return str(day)+' days'
                    if sec==1:
                        return str(day)+' days and '+str(sec)+' second'
                    return str(day)+' days and '+str(sec)+' seconds'
               if minu==1:
                    if sec==0:
                        return str(day)+' days and '+str(minu)+' minute'
                    if sec==1:
                        return str(day)+' days, '+str(minu)+' minute and '+str(sec)+' second'
                    return str(day)+' days, '+str(minu)+' minute and '+str(sec)+' seconds' 
               if minu>1:
                    if sec==0:
                        return str(day)+' days and '+str(minu)+' minutes'
                    if sec==1:
                        return str(day)+' days, '+str(minu)+' minutes and '+str(sec)+' second'
                    return str(day)+' days, '+str(minu)+' minutes and '+str(sec)+' seconds' 
                   
            if hour==1:
               if minu==0:
                   if sec==0:
                        return str(day)+' days and '+str(hour)+' hour and '+str(sec)
                       
                   if sec==1:
                        return str(day)+' days, '+str(hour)+' hour and '+str(sec)+' second'
                   return str(day)+' days, '+str(hour)+' hour and '+str(sec)+' seconds'
               if minu==1:
                   if sec==0:
                       return str(day)+' days, '+str(hour)+' hour, '+str(minu)+' minute'
                       
                   if sec==1:
                        return str(day)+' days, '+str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(day)+' days, '+str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' seconds' 
               if sec==0:
                   return str(day)+' days, '+str(hour)+' hours'
                   
               if sec==1:
                    return str(day)+' days, '+str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' second'
               return str(day)+' days, '+str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' seconds' 
            if hour>1:
                if minu==0:
                   if sec==0:
                       return str(day)+' days and '+str(hour)+' hours'
                       
                   if sec==1:
                        return str(day)+' days, '+str(hour)+' hours and '+str(sec)+' second'
                   return str(day)+' days, '+str(hour)+' hours and '+str(sec)+' seconds'
                if minu==1:
                   if sec==0:
                        return str(day)+' days, '+str(hour)+' hours and '+str(minu)+' minute'
                        
                   if sec==1:
                        return str(day)+' days, '+str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(day)+' days, '+str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' seconds' 
                if minu>1:
                    if sec==0:
                        return str(day)+' days, '+str(hour)+' hours and '+str(minu)+' minutes'
                        
                    if sec==1:
                        return str(day)+' days, '+str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' second'
                    return str(day)+' days, '+str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' seconds' 
      if year==1:
        if day==0:
            if hour==0:
               if minu==0:
                    if sec==0:
                        return str(year)+' year'
                    if sec==1:
                        return str(year)+' year and '+str(sec)+' second'
                    return str(year)+' year and '+str(sec)+' seconds'
               if minu==1:
                    if sec==0:
                        return str(year)+' year and '+str(minu)+' minute'
                    if sec==1:
                        return str(year)+' year, '+str(minu)+' minute and '+str(sec)+' second'
                    return str(year)+' year, '+str(minu)+' minute and '+str(sec)+' seconds' 
               if minu>1:
                    if sec==0:
                        return str(year)+' year and '+str(minu)+' minutes'
                    if sec==1:
                        return str(year)+' year, '+str(minu)+' minutes and '+str(sec)+' second'
                    return str(year)+' year, '+str(minu)+' minutes and '+str(sec)+' seconds' 
                   
            if hour==1:
               if minu==0:
                   if sec==0:
                        return str(year)+' year and  '+str(hour)+' hour'
                       
                   if sec==1:
                        return str(year)+' year, '+str(hour)+' hour and '+str(sec)+' second'
                   return str(year)+' year, '+str(hour)+' hour and '+str(sec)+' seconds'
               if minu==1:
                   if sec==0:
                       return str(year)+' year, '+str(hour)+' hour, '+str(minu)+' minute'
                       
                   if sec==1:
                        return str(year)+' year, '+str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(year)+' year, '+str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' seconds' 
               if sec==0:
                   return str(year)+' year, '+str(hour)+' hour, '+str(minu)+' minutes'
                   
               if sec==1:
                    return str(year)+' year, '+str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' second'
               return str(year)+' year, '+str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' seconds' 
            if hour>1:
                if minu==0:
                   if sec==0:
                       return str(year)+' year and '+str(hour)+' hours'
                       
                   if sec==1:
                        return str(year)+' year, '+str(hour)+' hours and '+str(sec)+' second'
                   return str(year)+' year, '+str(hour)+' hours and '+str(sec)+' seconds'
                if minu==1:
                   if sec==0:
                        return str(year)+' year, '+str(hour)+' hours and '+str(minu)+' minute'
                        
                   if sec==1:
                        return str(year)+' year, '+str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(year)+' year, '+str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' seconds' 
                if minu>1:
                    if sec==0:
                        return str(year)+' year, '+str(hour)+' hours and '+str(minu)+' minutes'
                        
                    if sec==1:
                        return str(year)+' year, '+str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' second'
                    return str(year)+' year, '+str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' seconds' 
                    
                
        if day==1:
            if hour==0:
               if minu==0:
                    if sec==0:
                        return str(year)+' year and  '+str(day)+' day'
                    if sec==1:
                        return str(year)+' year, '+str(day)+' day and '+str(sec)+' second'
                    return str(year)+' year, '+str(day)+' day and '+str(sec)+' seconds'
               if minu==1:
                    if sec==0:
                        return str(year)+' year, '+str(day)+' day and '+str(minu)+' minute'
                    if sec==1:
                        return str(year)+' year, '+str(day)+' day, '+str(minu)+' minute and '+str(sec)+' second'
                    return str(year)+' year, '+str(day)+' day, '+str(minu)+' minute and '+str(sec)+' seconds' 
               if minu>1:
                    if sec==0:
                        return str(year)+' year, '+str(day)+' day and '+str(minu)+' minutes'
                    if sec==1:
                        return str(year)+' year, '+str(day)+' day, '+str(minu)+' minutes and '+str(sec)+' second'
                    return str(year)+' year, '+str(day)+' day, '+str(minu)+' minutes and '+str(sec)+' seconds' 
                   
            if hour==1:
               if minu==0:
                   if sec==0:
                        return str(year)+' year, '+str(day)+' day and '+str(hour)+' hour and '+str(sec)
                       
                   if sec==1:
                        return str(year)+' year, '+str(day)+' day, '+str(hour)+' hour and '+str(sec)+' second'
                   return str(year)+' year, '+str(day)+' day, '+str(hour)+' hour and '+str(sec)+' seconds'
               if minu==1:
                   if sec==0:
                       return str(year)+' year, '+str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minute'
                       
                   if sec==1:
                        return str(year)+' year, '+str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(year)+' year, '+str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' seconds' 
               if sec==0:
                   return str(year)+' year, '+str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minutes'
                   
               if sec==1:
                    return str(year)+' year, '+str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' second'
               return str(year)+' year, '+str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' seconds' 
            if hour>1:
                if minu==0:
                   if sec==0:
                       return str(year)+' year, '+str(day)+' day and '+str(hour)+' hours'
                       
                   if sec==1:
                        return str(year)+' year, '+str(day)+' day, '+str(hour)+' hours and '+str(sec)+' second'
                   return str(year)+' year, '+str(day)+' day, '+str(hour)+' hours and '+str(sec)+' seconds'
                if minu==1:
                   if sec==0:
                        return str(year)+' year, '+str(day)+' day, '+str(hour)+' hours and '+str(minu)+' minute'
                        
                   if sec==1:
                        return str(year)+' year, '+str(day)+' day, '+str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(year)+' year, '+str(day)+' day, '+str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' seconds' 
                if minu>1:
                    if sec==0:
                        return str(year)+' year, '+str(day)+' day, '+str(day)+' day, '+str(hour)+' hours and '+str(minu)+' minutes'
                        
                    if sec==1:
                        return str(year)+' year, '+str(day)+' day, '+str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' second'
                    return str(year)+' year, '+str(day)+' day, '+str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' seconds' 
        if day>1:
            if hour==0:
               if minu==0:
                    if sec==0:
                        return str(year)+' year, and '+str(day)+' days'
                    if sec==1:
                        return str(year)+' year, '+str(day)+' days and '+str(sec)+' second'
                    return str(year)+' year, '+str(day)+' days and '+str(sec)+' seconds'
               if minu==1:
                    if sec==0:
                        return str(year)+' year, '+str(day)+' days and '+str(minu)+' minute'
                    if sec==1:
                        return str(year)+' year, '+str(day)+' days, '+str(minu)+' minute and '+str(sec)+' second'
                    return str(year)+' year, '+str(day)+' days, '+str(minu)+' minute and '+str(sec)+' seconds' 
               if minu>1:
                    if sec==0:
                        return str(year)+' year, '+str(day)+' days and '+str(minu)+' minutes'
                    if sec==1:
                        return str(year)+' year, '+str(day)+' days, '+str(minu)+' minutes and '+str(sec)+' second'
                    return str(year)+' year, '+str(day)+' days, '+str(minu)+' minutes and '+str(sec)+' seconds' 
                   
            if hour==1:
               if minu==0:
                   if sec==0:
                        return str(year)+' year, '+str(day)+' days and '+str(hour)+' hour and '+str(sec)
                       
                   if sec==1:
                        return str(year)+' year, '+str(day)+' days, '+str(hour)+' hour and '+str(sec)+' second'
                   return str(year)+' year, '+str(day)+' days, '+str(hour)+' hour and '+str(sec)+' seconds'
               if minu==1:
                   if sec==0:
                       return str(year)+' year, '+str(day)+' days, '+str(hour)+' hour, '+str(minu)+' minute'
                       
                   if sec==1:
                        return str(year)+' year, '+str(day)+' days, '+str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(year)+' year, '+str(day)+' days, '+str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' seconds' 
               if sec==0:
                   return str(year)+' year, '+str(day)+' days, '+str(hour)+' hours'
                   
               if sec==1:
                    return str(year)+' year, '+str(day)+' days, '+str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' second'
               return str(year)+' year, '+str(day)+' days, '+str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' seconds' 
            if hour>1:
                if minu==0:
                   if sec==0:
                       return str(year)+' year, '+str(day)+' days and '+str(hour)+' hours'
                       
                   if sec==1:
                        return str(year)+' year, '+str(day)+' days, '+str(hour)+' hours and '+str(sec)+' second'
                   return str(year)+' year, '+str(day)+' days, '+str(hour)+' hours and '+str(sec)+' seconds'
                if minu==1:
                   if sec==0:
                        return str(year)+' year, '+str(day)+' days, '+str(hour)+' hours and '+str(minu)+' minute'
                        
                   if sec==1:
                        return str(year)+' year, '+str(day)+' days, '+str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(year)+' year, '+str(day)+' days, '+str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' seconds' 
                if minu>1:
                    if sec==0:
                        return str(year)+' year, '+str(day)+' days, '+str(hour)+' hours and '+str(minu)+' minutes'
                        
                    if sec==1:
                        return str(year)+' year '+str(day)+' days, '+str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' second'
                    return str(year)+' year, '+str(day)+' days, '+str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' seconds' 
      if year>1:
        if day==0:
            if hour==0:
               if minu==0:
                    if sec==0:
                        return str(year)+' years'
                    if sec==1:
                        return str(year)+' years and '+str(sec)+' second'
                    return str(year)+' years and '+str(sec)+' seconds'
               if minu==1:
                    if sec==0:
                        return str(year)+' years and '+str(minu)+' minute'
                    if sec==1:
                        return str(year)+' years, '+str(minu)+' minute and '+str(sec)+' second'
                    return str(year)+' years, '+str(minu)+' minute and '+str(sec)+' seconds' 
               if minu>1:
                    if sec==0:
                        return str(year)+' years and '+str(minu)+' minutes'
                    if sec==1:
                        return str(year)+' years, '+str(minu)+' minutes and '+str(sec)+' second'
                    return str(year)+' years, '+str(minu)+' minutes and '+str(sec)+' seconds' 
                   
            if hour==1:
               if minu==0:
                   if sec==0:
                        return str(year)+' years and  '+str(hour)+' hour'
                       
                   if sec==1:
                        return str(year)+' years, '+str(hour)+' hour and '+str(sec)+' second'
                   return str(year)+' years, '+str(hour)+' hour and '+str(sec)+' seconds'
               if minu==1:
                   if sec==0:
                       return str(year)+' years, '+str(hour)+' hour, '+str(minu)+' minute'
                       
                   if sec==1:
                        return str(year)+' years, '+str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(year)+' years, '+str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' seconds' 
               if sec==0:
                   return str(year)+' years, '+str(hour)+' hour, '+str(minu)+' minutes'
                   
               if sec==1:
                    return str(year)+' years, '+str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' second'
               return str(year)+' years, '+str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' seconds' 
            if hour>1:
                if minu==0:
                   if sec==0:
                       return str(year)+' years and '+str(hour)+' hours'
                       
                   if sec==1:
                        return str(year)+' years, '+str(hour)+' hours and '+str(sec)+' second'
                   return str(year)+' years, '+str(hour)+' hours and '+str(sec)+' seconds'
                if minu==1:
                   if sec==0:
                        return str(year)+' years, '+str(hour)+' hours and '+str(minu)+' minute'
                        
                   if sec==1:
                        return str(year)+' years, '+str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(year)+' years, '+str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' seconds' 
                if minu>1:
                    if sec==0:
                        return str(year)+' years, '+str(hour)+' hours and '+str(minu)+' minutes'
                        
                    if sec==1:
                        return str(year)+' years, '+str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' second'
                    return str(year)+' years, '+str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' seconds' 
                    
                
        if day==1:
            if hour==0:
               if minu==0:
                    if sec==0:
                        return str(year)+' years and  '+str(day)+' day'
                    if sec==1:
                        return str(year)+' years, '+str(day)+' day and '+str(sec)+' second'
                    return str(year)+' years, '+str(day)+' day and '+str(sec)+' seconds'
               if minu==1:
                    if sec==0:
                        return str(year)+' years, '+str(day)+' day and '+str(minu)+' minute'
                    if sec==1:
                        return str(year)+' years, '+str(day)+' day, '+str(minu)+' minute and '+str(sec)+' second'
                    return str(year)+' years, '+str(day)+' day, '+str(minu)+' minute and '+str(sec)+' seconds' 
               if minu>1:
                    if sec==0:
                        return str(year)+' years, '+str(day)+' day and '+str(minu)+' minutes'
                    if sec==1:
                        return str(year)+' years, '+str(day)+' day, '+str(minu)+' minutes and '+str(sec)+' second'
                    return str(year)+' years, '+str(day)+' day, '+str(minu)+' minutes and '+str(sec)+' seconds' 
                   
            if hour==1:
               if minu==0:
                   if sec==0:
                        return str(year)+' years, '+str(day)+' day and '+str(hour)+' hour and '+str(sec)
                       
                   if sec==1:
                        return str(year)+' years, '+str(day)+' day, '+str(hour)+' hour and '+str(sec)+' second'
                   return str(year)+' years, '+str(day)+' day, '+str(hour)+' hour and '+str(sec)+' seconds'
               if minu==1:
                   if sec==0:
                       return str(year)+' years, '+str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minute'
                       
                   if sec==1:
                        return str(year)+' years, '+str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(year)+' yeas, '+str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' seconds' 
               if sec==0:
                   return str(year)+' years, '+str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minutes'
                   
               if sec==1:
                    return str(year)+' years, '+str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' second'
               return str(year)+' years, '+str(day)+' day, '+str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' seconds' 
            if hour>1:
                if minu==0:
                   if sec==0:
                       return str(year)+' years, '+str(day)+' day and '+str(hour)+' hours'
                       
                   if sec==1:
                        return str(year)+' years, '+str(day)+' day, '+str(hour)+' hours and '+str(sec)+' second'
                   return str(year)+' years, '+str(day)+' day, '+str(hour)+' hours and '+str(sec)+' seconds'
                if minu==1:
                   if sec==0:
                        return str(year)+' years, '+str(day)+' day, '+str(hour)+' hours and '+str(minu)+' minute'
                        
                   if sec==1:
                        return str(year)+' years, '+str(day)+' day, '+str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(year)+' years, '+str(day)+' day, '+str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' seconds' 
                if minu>1:
                    if sec==0:
                        return str(year)+' years, '+str(day)+' day, '+str(day)+' day, '+str(hour)+' hours and '+str(minu)+' minutes'
                        
                    if sec==1:
                        return str(year)+' years, '+str(day)+' day, '+str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' second'
                    return str(year)+' years, '+str(day)+' day, '+str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' seconds' 
        if day>1:
            if hour==0:
               if minu==0:
                    if sec==0:
                        return str(year)+' years, and '+str(day)+' days'
                    if sec==1:
                        return str(year)+' years, '+str(day)+' days and '+str(sec)+' second'
                    return str(year)+' years, '+str(day)+' days and '+str(sec)+' seconds'
               if minu==1:
                    if sec==0:
                        return str(year)+' years, '+str(day)+' days and '+str(minu)+' minute'
                    if sec==1:
                        return str(year)+' years, '+str(day)+' days, '+str(minu)+' minute and '+str(sec)+' second'
                    return str(year)+' years, '+str(day)+' days, '+str(minu)+' minute and '+str(sec)+' seconds' 
               if minu>1:
                    if sec==0:
                        return str(year)+' years, '+str(day)+' days and '+str(minu)+' minutes'
                    if sec==1:
                        return str(year)+' years, '+str(day)+' days, '+str(minu)+' minutes and '+str(sec)+' second'
                    return str(year)+' years, '+str(day)+' days, '+str(minu)+' minutes and '+str(sec)+' seconds' 
                   
            if hour==1:
               if minu==0:
                   if sec==0:
                        return str(year)+' years, '+str(day)+' days and '+str(hour)+' hour and '+str(sec)
                       
                   if sec==1:
                        return str(year)+' years, '+str(day)+' days, '+str(hour)+' hour and '+str(sec)+' second'
                   return str(year)+' years, '+str(day)+' days, '+str(hour)+' hour and '+str(sec)+' seconds'
               if minu==1:
                   if sec==0:
                       return str(year)+' years, '+str(day)+' days, '+str(hour)+' hour, '+str(minu)+' minute'
                       
                   if sec==1:
                        return str(year)+' years, '+str(day)+' days, '+str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(year)+' years, '+str(day)+' days, '+str(hour)+' hour, '+str(minu)+' minute and '+str(sec)+' seconds' 
               if sec==0:
                   return str(year)+' years, '+str(day)+' days, '+str(hour)+' hours'
                   
               if sec==1:
                    return str(year)+' years, '+str(day)+' days, '+str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' second'
               return str(year)+' years, '+str(day)+' days, '+str(hour)+' hour, '+str(minu)+' minutes and '+str(sec)+' seconds' 
            if hour>1:
                if minu==0:
                   if sec==0:
                       return str(year)+' years, '+str(day)+' days and '+str(hour)+' hours'
                       
                   if sec==1:
                        return str(year)+' years, '+str(day)+' days, '+str(hour)+' hours and '+str(sec)+' second'
                   return str(year)+' years, '+str(day)+' days, '+str(hour)+' hours and '+str(sec)+' seconds'
                if minu==1:
                   if sec==0:
                        return str(year)+' years, '+str(day)+' days, '+str(hour)+' hours and '+str(minu)+' minute'
                        
                   if sec==1:
                        return str(year)+' years, '+str(day)+' days, '+str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' second'
                   return str(year)+' years, '+str(day)+' days, '+str(hour)+' hours, '+str(minu)+' minute and '+str(sec)+' seconds' 
                if minu>1:
                    if sec==0:
                        return str(year)+' years, '+str(day)+' days, '+str(hour)+' hours and '+str(minu)+' minutes'
                        
                    if sec==1:
                        return str(year)+' years, '+str(day)+' days, '+str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' second'
                    return str(year)+' years, '+str(day)+' days, '+str(hour)+' hours, '+str(minu)+' minutes and '+str(sec)+' seconds' 
            
            


def format_duration(s):
    dt = []
    for b, w in [(60, 'second'), (60, 'minute'), (24, 'hour'), (365, 'day'), (s+1, 'year')]:
        s, m = divmod(s, b)
        if m: dt.append('%d %s%s' % (m, w, 's' * (m > 1)))
    return ' and '.join(', '.join(dt[::-1]).rsplit(', ', 1)) or 'now'