Updated 16 May 2016.

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+------------------------------------------------------------------+
|                                                                  |
|          d                      i                      @@@       |
|          d   ee   nnn   nnn          sss              @ @ @      |
|        ddd  eeee  n  n  n  n    i   ss                @ @@@      |
|       d  d  e     n  n  n  n    i     ss              @          |
|        ddd   ee   n  n  n  n    i   sss                @@@@      |
|                                                                  |
|                                                                  |
+------------------------------------------------------------------+
|                                                                  |
|       b                              t                 t         |
|       b      ee   rrr    ggg   ee   tttt         sss  tttt       |
|       bbb   eeee  r  r  g  g  eeee   t          ss     t         |
|       b  b  e     r      ggg  e      t t    .     ss   t t       |
|       bbb    ee   r        g   ee     t     .   sss     t        |
|                          gg                                      |
|                                                                  |
+------------------------------------------------------------------+