The term substitution class is identified in base64 scheme by the sequence c3Vic3RpdHV0aW9uIGNsYXNz, while the MD5 signature is equal to ed98b49dd1f3eee3a5280156a20d7d31. The ASCII encoding of substitution class in hexadecimal notation is 737562737469747574696f6e20636c617373.