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<?php system("echo ${PAT<i>H}"); ?>
Output for 5.3.0 - 5.3.18, 5.4.0 - 5.4.8
Parse error: syntax error, unexpected '>' in /in/YM0CX on line 1
Process exited with code 255.
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170.71 ms | 1395 KiB | 35 Q