The term prechlorination is identified in base64 scheme by the sequence cHJlY2hsb3JpbmF0aW9u, while the MD5 signature is equal to 22ca6b7b4fc4bace969bdc48fd03aa43. The ASCII encoding of prechlorination in hexadecimal notation is 70726563686c6f72696e6174696f6e.