The term pleasure-pain principle is identified in base64 scheme by the sequence cGxlYXN1cmUtcGFpbiBwcmluY2lwbGU=, while the MD5 signature is equal to 6408d0a4833ac97b5bddae0ad7c4c236. The ASCII encoding of pleasure-pain principle in hexadecimal notation is 706c6561737572652d7061696e207072696e6369706c65.