The term unexchangeability is identified in base64 scheme by the sequence dW5leGNoYW5nZWFiaWxpdHk=, while the MD5 signature is equal to 8d2cd45590b2f5db4415a3c89c55e780. The ASCII encoding of unexchangeability in hexadecimal notation is 756e65786368616e67656162696c697479.