def alphanumeric_forever():
"""Yield a1, ..., z1, a2, ..., z2, ..."""
cnt = 0
while True:
cnt += 1
for l in string.lowercase():
yield l + str(cnt)
import string
print "Enter the word or phrase you want to convert."
a = raw_input()
print "Do you want to capitalize, turn every character into lowercase, or turn every character into uppercase?"
b = raw_input()
if b == "capitalize":
print string.capitalize(a)
if b == "turn every character into lowercase":
print string.lowercase(a)
if b == "turn every character into uppercase":
print string.upper(a)
def letters_forever():
"""Yield the letters of the alphabet, starting at a after every z"""
while True:
for l in string.lowercase():
yield l