The term osip mandelstam is identified in base64 scheme by the sequence b3NpcCBtYW5kZWxzdGFt, while the MD5 signature is equal to 57e656b1ffba7685da32e9af03d0bd83. The ASCII encoding of osip mandelstam in hexadecimal notation is 6f736970206d616e64656c7374616d.