# ROT13 reference import codecs def rot13(secret): """ROT13 encode/decode NOTE: encode and decode are the same operation in the ROT cipher family. """ return codecs.encode(secret, 'rot_13') def choose_longest(): """Echo the longest of the two strings given by the user to the program """ user_value_1 = input("What's your first string? ") user_value_2 = input("What's your second string? ") longe..