The term primary amenorrhea is identified in base64 scheme by the sequence cHJpbWFyeSBhbWVub3JyaGVh, while the MD5 signature is equal to a23da15cb3e4a7a4f376e4286b6872e5. The ASCII encoding of primary amenorrhea in hexadecimal notation is 7072696d61727920616d656e6f7272686561.