The term letter of mark and reprisal is identified in base64 scheme by the sequence bGV0dGVyIG9mIG1hcmsgYW5kIHJlcHJpc2Fs, while the MD5 signature is equal to 911faef2b5831bc600e3ef96dd9f9db6. The ASCII encoding of letter of mark and reprisal in hexadecimal notation is 6c6574746572206f66206d61726b20616e6420726570726973616c.