<?php

class Person
{
    /**
     * @var string
     */
    private $name;

    /**
     * @var int
     */
    private $age;

    /**
     * Person constructor.
     * @param string $name
     * @param int $age
     * @throws Exception
     */
    public function __construct(string $name, int $age)
    {
        $this->setName($name);
        $this->setAge($age);
    }

    /**
     * @return string
     */
    public function getName(): string
    {
        return $this->name;
    }

    /**
     * @param string $name
     * @throws Exception
     */
    protected function setName(string $name): void
    {
        if ($name < 3) {
            throw new Exception("Name's length should not be less than 3 symbols!");
        }
        $this->name = $name;
    }

    /**
     * @return int
     */
    public function getAge(): int
    {
        return $this->age;
    }

    /**
     * @param int $age
     * @throws Exception
     */
    protected function setAge(int $age): void
    {
        if ($age < 1) {
            throw new Exception("Age must be positive!");
        }
        $this->age = $age;
    }

}

////////////////////////
class Child extends Person
{
    /**
     * @var string
     */
    private $name;

    /**
     * @var int
     */
    private $age;

    /**
     * Child constructor.
     * @param string $name
     * @param int $age
     * @throws Exception
     */
    public function __construct(string $name, int $age)
    {
        parent::__construct($name, $age);
    }

    /**
     * @return string
     */
    public function getName(): string
    {
        return $this->name;
    }

    /**
     * @param string $name
     * @throws Exception
     */
    protected function setName(string $name): void
    {
        if ($name < 3) {
            throw new Exception("Name's length should not be less than 3 symbols!");
        }
        $this->name = $name;
    }

    /**
     * @return int
     */
    public function getAge(): int
    {
        return $this->age;
    }

    /**
     * @param int $age
     * @throws Exception
     */
    protected function setAge(int $age): void
    {
        if ($age >= 15) {
            throw new Exception("Child's age must be less than 16!");
        }
        $this->age = $age;
    }

}

//////////////////////////
$name = readline();
$age = intval(readline());

try {
    $class = new Person($name, $age);
} catch (Exception $e) {
    echo $e->getMessage();
    return $e;
}