The term four-centered arch is identified in base64 scheme by the sequence Zm91ci1jZW50ZXJlZCBhcmNo, while the MD5 signature is equal to 37544fc62e6453ce8bb7118f2f6a8d1f. The ASCII encoding of four-centered arch in hexadecimal notation is 666f75722d63656e74657265642061726368.