class Beaufort {
	private string $cipher;

	public string __construct(string $text, string $key) {
		string $alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
		for(int $i = 0; $i < strlen($text); $i++) {
			int $j;
			char $c0 = $text[$i];
			char $c1 = $key[$i % strlen($key)];
			int $start = 0;
			for($j = 0; $j < 26; $j++) {
				if($alphabet[$j] == strtoupper($c0)) {
					$start = $j;
					break;
				}
			}
			int $offset = 0;
			for($j = $start; $j < $start + 26; $j++) {
				int $letter = $j %26;
				if($alphabet[$letter] == strtoupper($c1)) {
					break;
				}
					$offset++;
			}
			$this->cipher += $alphabet[$offset];
		}
	}

	public string getCipher() {
		return $this->cipher;
	}

}

class Program {

	public void main() {
		object $beaufort = new Beaufort('thisisasecretmessage', 'youwillneverguessit');
		var_dump($beaufort->getCipher());
	}

}