The term lexical ambiguity is identified in base64 scheme by the sequence bGV4aWNhbCBhbWJpZ3VpdHk=, while the MD5 signature is equal to 939f1eed73e615f3a16376a64d4210d5. The ASCII encoding of lexical ambiguity in hexadecimal notation is 6c65786963616c20616d62696775697479.