dikiwidia

<?php

$first_crypt = "AB";
$second_crypt = "AB";
$result_crypt = "BCC";

function calc($first_crypt, $second_crypt, $result_crypt, $operator = 'add') {
    $crypt_input = str_split($first_crypt . $second_crypt . $result_crypt);
    $merge_input = array_unique($crypt_input);
    sort($merge_input);