John has invited some friends. His list is:
```
s = "Fred:Corwill;Wilfred:Corwill;Barney:Tornbull;Betty:Tornbull;Bjon:Tornbull;Raphael:Corwill;Alfred:Corwill";
```
Could you make a program that 
- makes this string uppercase
- gives it sorted in alphabetical order by last name. 
When the last names are the same, sort them by first name.
Last name and first name of a guest come in the result between parentheses separated by a comma.
So the result of function `meeting(s)` will be:
```
"(CORWILL, ALFRED)(CORWILL, FRED)(CORWILL, RAPHAEL)(CORWILL, WILFRED)(TORNBULL, BARNEY)(TORNBULL, BETTY)(TORNBULL, BJON)"
```
It can happen that in two distinct families with the same family name two people have the same first name too.
# Notes
- You can see another examples in the "Sample tests".
def meeting(s):
    return ''.join(sorted(('({1}, {0})'.format(*pair.split(':')) for pair in s.upper().split(';'))))
def meeting(s):
    return ''.join(sorted(('({1}, {0})'.format(*pair.split(':')) for pair in s.upper().split(';'))))