/4\
                                           /  |  \
                                         /    |   \
                                       /      |      \
                                     /        |        \
                                   /          5          \
                                 /            |            \
                               /              |              \
                             /                |                \
                           /                  6                  \
                         /                    |                    \
                        3-----4------5-----6-6.5-----6--------------5
                       /|\                    |                    /| \
                     /  |  4                  |                  /  |   \
                   /    |    \                7                6    |     \
                 /      |      5              |              /      |       \
               /        4        \            |            /        6         \
             /          |          6          |          7          |           \
           /            |            \        8        /            |             \
         /              |              7      |   .  /              |               \
       /                5                \    |   8                 |                 \
     /                  |                  8  |  /      .           7                   \
   /                    |                    \|/                    |                     \
  2-----3------4----5 -5.5--6-----7-----8-----9-------------8------7.5------7--------------6
   \                    |                    /|\                    |                     /
     \                  |                  8  |  \                  |                   /
       \                5                /    |    \                |                 /
         \              |              7      |  .   \              7               /
           \            |            /        8        8            |             /
             \          |          6          |          \          |           /
               \        4        /            |            \        |         /
                 \      |      5              |              \      |       /
                   \    |    /                7                7    |     /
                     \  |  4                  |                  \  |   /
                       \|/                    |                    \| /
                        3-----4------5-----6-6.5--------------------6
                         \                    |                    / 
                           \                  |                  / 
                             \                6                / 
                               \              |              / 
                                 \            |            / 
                                   \          |          5
                                     \        5        /
                                       \      |      /
                                         \    |    /
                                           \  |  /
                                             \4/