beginner question (True False help)

[eschneider92 at comcast.net]

This is what I ended up with btw. Does this insult anyone's more well attuned Python sensibilities?

letters='abcdefghijkl'
def repeat():
    print('wanna go again?')
    batman=input()
    if batman in ('y','yes'):
        main()
    else:
        return
def main():
    print('guess a letter')
    batman=input()
    if batman in letters:
        print('ok that letter was in letters')
        repeat()
    else:
        print('asdasdasd')
        repeat()
main()
print('how ya doin')