Lander

spl_autoload_register(function($class) {
    if (substr($class, -5) == 'trait') {
        require_once (__DIR__ . '/../traits/' . $class . '.php');
    }
});

((strlen($x) == 0 && strlen($y) == 0 && strlen($z) !== 0) || (strlen($x) !== 0 && strlen($y) == 0 && strlen($z) == 0) || (strlen($x) == 0 && strlen($y) !== 0 && strlen($z) == 0))