28 lines
491 B
Python
28 lines
491 B
Python
#!/usr/bin/env python3
|
|
# coding: utf8
|
|
|
|
"""017-print-every-two-letters-pairs.py"""
|
|
from string import ascii_lowercase
|
|
|
|
def main():
|
|
"""
|
|
:Examples:
|
|
>>> main() # doctest: +ELLIPSIS
|
|
ab
|
|
ac
|
|
...
|
|
ba
|
|
bc
|
|
...
|
|
zy
|
|
"""
|
|
for letter_1 in ascii_lowercase:
|
|
for letter_2 in ascii_lowercase:
|
|
if letter_1 != letter_2:
|
|
print(f"{letter_1}{letter_2}")
|
|
|
|
if __name__ == "__main__":
|
|
import doctest
|
|
doctest.testmod()
|
|
main()
|