The term alphabetic character is identified in base64 scheme by the sequence YWxwaGFiZXRpYyBjaGFyYWN0ZXI=, while the MD5 signature is equal to 452f4cffeaaac10e85cac8b29bae4f8f. The ASCII encoding of alphabetic character in hexadecimal notation is 616c706861626574696320636861726163746572.