<?php
$user = readline();

$reverseUser = strrev($user);
$counter = 0;
    while(true) {
       $pass = readline();
      if($pass == $reverseUser) {
          echo "User $user logged in.";
          break;
      } else {
          echo "Incorrect password. Try again." . PHP_EOL;
          $counter++;

      }
      if($counter >= 3) {
          echo "User $user blocked!";
          break;
      }
    }
?>