Задача 6. Генератор на банкови сметки

<?php

$num1 = intval(readline());
$alpha1 = (readline());
$alpha2 = (readline());
$alpha3 = (readline());
$num2 = intval(readline());
$max = intval(readline());

$valid = 0;

for ($a = $num1; $a <= 99; $a++) {
    for ($e = $num2; $e >= 10; $e--) {
        if (($a % 10 == 2) && ($e % 10 == 5)) {
            $valid++;
        }
        if ($valid == $max) {
            echo $a . $alpha1 . $alpha2 . $alpha3 . $e . PHP_EOL;
            return;
        }
    }
}