The term sigmoid colon is identified in base64 scheme by the sequence c2lnbW9pZCBjb2xvbg==, while the MD5 signature is equal to 5cf2c8ddf8582eab52c9c5e7af29d644. The ASCII encoding of sigmoid colon in hexadecimal notation is 7369676d6f696420636f6c6f6e.