+-----+-----+-----+-----+-----+-----+-----+-----+-----+
|                                                     |
|     X     X  8  X     X     X     X     X  9  X     |
|                                                     |
+  X  +  X  +  X  +  X  +  X  +  X  +  X  +  X  +  X  +
|                                                     |
|     X     X     X     X     X  8  X  1  X     X  5  |
|                                                     |
+  X  +  X  +  X  +  X  +  X  +  X  +  X  +  X  +  X  +
|                                                     |
|     X     X     X     X     X     X     X  6  X     |
|                                                     |
+  X  +  X  +  X  +  X  +  X  +  X  +  X  +  X  +  X  +
|                                                     |
|  8  X     X     X     X  5  X  9  X     X     X     |
|                                                     |
+  X  +  X  +  X  +  X  +  X  +  X  +  X  +  X  +  X  +
|                                                     |
|     X     X     X  1  X     X     X     X     X     |
|                                                     |
+  X  +  X  +  X  +  X  +  X  +  X  +  X  +  X  +  X  +
|                                                     |
|     X     X     X     X     X  6  X  8  X     X     |
|                                                     |
+  X  +  X  +  X  +  X  +  X  +  X  +  X  +  X  +  X  +
|                                                     |
|  9  X     X     X  8  X     X     X     X     X     |
|                                                     |
+  X  +  X  +  X  +  X  +  X  +  X  +  X  +  X  +  X  +
|                                                     |
|  6  X     X  1  X     X     X     X     X     X     |
|                                                     |
+  X  +  X  +  X  +  X  +  X  +  X  +  X  +  X  +  X  +
|                                                     |
|     X  5  X     X     X     X     X     X  8  X     |
|                                                     |
+-----+-----+-----+-----+-----+-----+-----+-----+-----+