switch case with range

[jun]

I'm new to python and working on some homework.

def letter(i):
    switcher={
            0:'a',
            1:'b',
            2:'c'
            }
    return switcher.get(i,"Invalid")

Output:
letter(0) -> 'a'
letter(2) -> 'c'
letter(3) -> 'Invalid'

Can I use a range in the case#? something like below, I tried different ways but didn't work.

            0:'a',
            1:'b',
         2..5:'c'

I also tried

range(2,5):'c' 

didn't work.

Is there easy way to do that?

Thanks,