25    23   22   16   15   12   11        6     5
       26.____.    .____.    .____.    .____.         .____.
         |    |   /     |    |    |    |    |         |    |
         |    |  /      .21  |    |    |    |         |    |
         |  24._/      /     |    |    |    |         |    |
         |            /      |    |    |    |         |    |
         |          ./0      |    |    |    |         |    |
         |           \       |    |    |    |         |    |
         |  29._      \      |    |    |    |0    9   |    |4
         |    | \      \.19  |    |    |    .____.    |    .____.3
         |    |  \      |    |    |    |         |    |         |
         .____.   \.____.____.____.____._________.____.__.__.___.
       27    28    30   18   17   14   13       8    7   1 /31   2
                                                          /           
                           47    45    56   33   32,----+'
                     48.____.     .____.____.____./___.44
                       |     \   /     |    |         |               
                       |      \./6     |    |  42.____.43
                       |               |    |    |                    
                       |               |    |  41.__.40
                       |  51.     .53  |    |       |
                       |    |\   /|    |    |  38.__.39
                       |    |5\./ |    |    |    |
                       |    |     |    |    |    .____.36
                       |    |     |    |    |    37   |
                       .____.     .____.    ._________.
                     49    50    54   55    34         35