<?php

class Person
{
    public $name;
    public $age;

    public function getAge() {
        return $this->age;
    }

    public function getName() {
        return $this->name;
    }

    public function __construct(string $name, int $age)
    {
        $this->name = $name;
        $this->age = $age;
    }

    public function __toString()
    {
        return $this->name . " - " . $this->age;
    }
}

$n = intval(fgets(STDIN));
$people = [];

for ($i = 0; $i < $n; $i++) {
    $input = explode(" ", trim(fgets(STDIN)));
    $people[] = new Person($input[0], $input[1]);
}

$filtered = array_filter($people, function (Person $person) {
    return $person->getAge() > 30;
});

usort($filtered, function (Person $a, Person $b) {
    return $a->getName() <=> $b->getName();
});

foreach ($filtered as $person) {
    echo $person . PHP_EOL;
}

?>