<?php
$input = trim(fgets(STDIN));

$usernamePasswordPPairs = [];
while (1) {
    if ($input == 'login'){
        break;
    }
    $currInput = explode('->',$input);

    $user = trim($currInput[0]);
    $pass = trim($currInput[1]);

    $usernamePasswordPPairs[$user] = $pass;

    $input = trim(fgets(STDIN));
}

$loginRequestInput = trim(fgets(STDIN));
$unsuccessfulLogin = 0;

while (1) {
    if ($loginRequestInput == 'end'){
        break;
    }
    $currLoginRequestInput = explode('->',$loginRequestInput);

    $userLog = trim($currLoginRequestInput[0]);
    $passLog = trim($currLoginRequestInput[1]);

    $login = false;

    foreach ($usernamePasswordPPairs as $userName => $password) {
        if (($userName == $userLog) && ($password == $passLog)){
            print "$userLog: logged in successfully \r\n";
            $login = true;
        }
    }

    if (!$login){
        print "$userLog: login failed \r\n";
        $unsuccessfulLogin ++;
    }

    $loginRequestInput = trim(fgets(STDIN));
}

print "unsuccessful login attempt: $unsuccessfulLogin";