The term recursive definition is identified in base64 scheme by the sequence cmVjdXJzaXZlIGRlZmluaXRpb24=, while the MD5 signature is equal to 8f91b6f853a3f4139fe2d6078ce7d3f0. The ASCII encoding of recursive definition in hexadecimal notation is 72656375727369766520646566696e6974696f6e.