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<?php $input = "1b37373331363f78151b7f2b783431333d78397828372d363c78373e783a393b3736"; echo $input . "\n"; echo hex2bin($input ^ a) . "\n"; ?>
Output for git.master, git.master_jit, rfc.property-hooks
1b37373331363f78151b7f2b783431333d78397828372d363c78373e783a393b3736 Fatal error: Uncaught Error: Undefined constant "a" in /in/6JlOm:6 Stack trace: #0 {main} thrown in /in/6JlOm on line 6
Process exited with code 255.

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