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<?php echo pack("H*", hash("sha1", hash("sha1", 'fuck', true), true));
Output for git.master, git.master_jit, rfc.property-hooks
Warning: pack(): Type H: illegal hex digit W in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit  in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit � in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit � in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit R in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit � in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit  in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit j in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit � in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit  in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit � in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit � in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit � in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit � in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit � in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit � in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit � in /in/LBSaS on line 2 Warning: pack(): Type H: illegal hex digit s in /in/LBSaS on line 2

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