#!/usr/bin/env python

import sys
import string

if len(sys.argv) != 2:
    print >>sys.stderr, "Usage: %s label" % sys.argv[0]
    sys.exit(1)

label = string.lower(sys.argv[1])
for letter_rank in range(0,len(label)):
    code = ord(label[letter_rank])
    for i in range(0,8):
        new_code = code ^ (1 << i)
        if (new_code >= ord('a') and new_code <= ord('z')) or \
                (new_code >= ord('A') and new_code <= ord('Z')) or \
                (new_code >= ord('0') and new_code <= ord('9')) or \
                new_code == ord('-'):
            new_label = label[0:letter_rank] + chr(new_code) + \
                label[letter_rank+1:len(label)]
            if string.lower(new_label) != label:
                print new_label