The term past perfect tense is identified in base64 scheme by the sequence cGFzdCBwZXJmZWN0IHRlbnNl, while the MD5 signature is equal to 9e5ccdef7c0660edb3b3e62610b39eb1. The ASCII encoding of past perfect tense in hexadecimal notation is 7061737420706572666563742074656e7365.