<?php
class Ancient_Mahjong {
    public $hu;
    public $han;
    public function __construct($hu,$han) {
        $this->hu = $hu;
        $this->han = $han;
    }
}
class China_Mahjong extends Ancient_Mahjong {
    public function Calculate_One() {
        return 3*$this->hu * $this->han;
    }
    public function Calculate_Two() {
        return 4*$this->hu * $this->han;
    }
}
class Japan_Mahjong extends Ancient_Mahjong {
    public function Calculate_One() {
        return ((2**($this->han+2)*$this->hu*4));
    }
    public function Calculate_Two() {
        return ((2**($this->han+2)*$this->hu*6));
    }
}

echo "Hello world!\n";