                             |
|                                                           |
|              P &lt;------------@------------ &quot;P&quot;             |
|             ^^^                           ^^^             |
|              | \                           | \            |
|            . | .\                        . | .\           |
|              |   \                         |   \          |
|           .  |  . \                     .  |  . \         |
|              |     M &lt;------@