<?php
define('START', 32);
define('END', 126);
define('MAX_LEN', 8);

$pass = array(chr(START), chr(START), chr(START));
$len = count($pass);
$end = false;

while (!$end) {
    if (crypt(implode('', $pass), 'wM') == "wMIYWuxuDO0Kc") {
        echo 'OK! C=' . implode('', $pass) . "\n";
        break;
    }
    $end = nextPass($pass, 0);
}

function nextPass(&$pass, $i) {
    if (count($pass) <= $i) {
        if ($i >= MAX_LEN) {
            return true;
        } else {
            $pass[] = chr(START);
        }
    } else {
        $code = ord($pass[$i]);
        if ($code > END) {
            $pass[$i] = chr(START);
            return nextPass($pass, $i + 1);
        } else {
            $pass[$i] = chr($code + 1);
        }
    }
    return false;
}