class Program {

	private function num2Roman(int $num) {
		int $n = intval($num);
		int $result = '';
		mixed $lookup = array('M' => 1000, 'CM' => 900, 'D' => 500, 'CD' => 400,
			'C' => 100, 'XC' => 90, 'L' => 50, 'XL' => 40,
			'X' => 10, 'IX' => 9, 'V' => 5, 'IV' => 4, 'I' => 1);

		int $matches;
		foreach($lookup as $roman => $value) {
			 $matches = intval($n / $value);
			$result += str_repeat($roman, $matches);
			$n = $n % $value;
		}
		return $result;
	}

	public function main() {
		print('   7 => ' + $this->num2Roman(7) + "\n");	
		print('   9 => ' + $this->num2Roman(9) + "\n");	
		print('  11 => ' + $this->num2Roman(11) + "\n");	
		print('  42 => ' + $this->num2Roman(42) + "\n");	
		print(' 105 => ' + $this->num2Roman(105) + "\n");	
		print('1984 => ' + $this->num2Roman(1984) + "\n");	
		print('1999 => ' + $this->num2Roman(1999) + "\n");	
		print('2018 => ' + $this->num2Roman(2018) + "\n");	
		print('2144 => ' + $this->num2Roman(2144) + "\n");	
	 }

}