The goal of this kata is to write a function that takes two inputs: a string and a character. The function will count the number of times that character appears in the string. The count is case insensitive.
For example: 
```python
count_char("fizzbuzz","z") => 4
count_char("Fancy fifth fly aloof","f") => 5
```
The character can be any alphanumeric character. 
Good luck.
def count_char(a,b):
    a=a.lower()
    b=b.lower()
    return a.count(b)

def count_char(a,b):
    a=a.lower()
    b=b.lower()
    return a.count(b)
