From c1a604fd1dee61c70c885586eb7bea7922450f56 Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Sat, 9 Sep 2023 00:46:34 +0900
Subject: puzzle quine

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+# 9 Puzzle Quine
+
+This is a playable quine, a program that outputs the source code itself.
+
+# How to Play
+
+```
+$ php 9.php <operation>
+```
+
+Available operations:
+
+* h: Move left
+* j: Move down
+* k: Move up
+* l: Move right
+
+An invalid operation is just ignored.
+
+## How to Shuffle
+
+There is no option to shuffle. Do manually like this:
+
+```
+$ cat 9.php | php -- l | php -- h | php -- k | ...
+```
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