<?php
$user = readline();
$reversedUser = "";
$counter = 0;
for($i = strlen($user) - 1; $i >= 0; $i--) {
    $reversedUser .= $user[$i];
}
while(true) {
    $pass = readline();

    if($pass !== $reversedUser) {
        $counter++;
        if($counter === 4) {
            echo "User $user blocked!" . PHP_EOL;
            return;
        }
        echo "Incorrect password. Try again." . PHP_EOL;

    } else {
        echo "User $user logged in."; break;
    }

}
?>