Hacking hashes

import sys

A, B = [int(x) for x in input().split()]

def F(s):
    h = 0
    for c in s:
        h = (h * A + ord(c)) % B
    return h

def sortie(string_1, string_2):
    print(string_1, end='')
    print(' ', end='')
    print(string_2, end='')
    sys.exit()

alphabet = list(map(chr, range(97, 123)))
size = 0
verif = {}

while True:
    size += 1
    calc = [0 for _ in range(size)]
    string = ['a' for _ in range(size)]
    i = size-1
    while i >= 0:
        if i == size-1:
            for char in alphabet:
                string[i] = char
                res = F(string)
                if res in verif:
                    str_2 = "".join(string)
                    if str_2 != verif[res]:
                        sortie(str_2, verif[res])
                else:
                    verif[res] = "".join(string)
            i -= 1
        else:
            if calc[i] == len(alphabet)-1:
                i -= 1
            else:
                calc[i] += 1
                string[i] = alphabet[calc[i]]
                i += 1

Test 1

Verdict: ACCEPTED

Test 2

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Test 90

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