# increment_smallest_digit.py

# increment_smallest_digit.py

def increment_smallest_digit(chars):
    chars = list(chars)
    smallest_digit = min(chars)
    smallest_digit_index = chars.index(smallest_digit)
    incremented_digit = chr(ord(smallest_digit) + 1)
    chars[smallest_digit_index] = incremented_digit
    return ''.join(chars)

import random

sss = list('00112233445566778899')
for i in '.'*20:
    random.shuffle(sss)
    s = ''.join(sss[:4])
    print(s, increment_smallest_digit(s))