The term positive reinforcer is identified in base64 scheme by the sequence cG9zaXRpdmUgcmVpbmZvcmNlcg==, while the MD5 signature is equal to d8b3495f57d9ef58e19e99342d58a186. The ASCII encoding of positive reinforcer in hexadecimal notation is 706f736974697665207265696e666f72636572.