beginner question (True False help)

Fri Aug 9 18:27:50 EDT 2013

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')