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<?php if(!isset($_GET["top"]) or $_GET["top"]<1 or $_GET["top"]>26): base_convert($_GET[top], 10, 36); $var = base_convert($_GET[top], 10, 36); echo $var ?>
Output for 5.4.0 - 5.4.26
Parse error: syntax error, unexpected end of file in /in/TnqfF on line 8
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected $end in /in/TnqfF on line 8
Process exited with code 255.

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