The term acid precipitation is identified in base64 scheme by the sequence YWNpZCBwcmVjaXBpdGF0aW9u, while the MD5 signature is equal to 28ee2d09dce1c7cb7f5a0397d21efbf3. The ASCII encoding of acid precipitation in hexadecimal notation is 616369642070726563697069746174696f6e.