The term withdrawal symptom is identified in base64 scheme by the sequence d2l0aGRyYXdhbCBzeW1wdG9t, while the MD5 signature is equal to afe7971d45f398b6fe8fcc627a5f837c. The ASCII encoding of withdrawal symptom in hexadecimal notation is 7769746864726177616c2073796d70746f6d.