def multiletters():
"""Generator of count-by-letter strings"""
for num in itertools.count(1):
for prod in itertools.product(ascii_lowercase, repeat=num):
yield ''.join(prod)
def multiletters():
"""Generator of count-by-letter strings"""
for num in itertools.count(1):
for prod in itertools.product(ascii_lowercase, repeat=num):
yield ''.join(prod)
