The term negative reinforcing stimulus is identified in base64 scheme by the sequence bmVnYXRpdmUgcmVpbmZvcmNpbmcgc3RpbXVsdXM=, while the MD5 signature is equal to 464065902a340b7b03fd54bb22413ba3. The ASCII encoding of negative reinforcing stimulus in hexadecimal notation is 6e65676174697665207265696e666f7263696e67207374696d756c7573.