The term perfective tense is identified in base64 scheme by the sequence cGVyZmVjdGl2ZSB0ZW5zZQ==, while the MD5 signature is equal to 67480a0aa6664e6f204cd328b8f7c48e. The ASCII encoding of perfective tense in hexadecimal notation is 706572666563746976652074656e7365.