[85]    [84]
                    |  \       \                  [73]
                  [88]-[86]   [82]-[80]-[78]-[76]<  |
                 / \  |  \          |             [74]  [72]
              [90]  [89]-[87]-[83]-[81]-[79]-[77]<  |     |
              /     /                             [75]  [70]
           [92]  [91]                                \     \
           /   \ /                                   [71]  [68]
    [96]-[94] [93]                                      \  /   \
              /                                         [69]  [66]
           [95]                                            \     \
            /                                              [67]  [64]-[61]
[1]--[2]-[3]                                                  \  /  | /
  \  / \ /                                                    [65]-[62]
  [4]--[5]                                                      |  /
   |    |                                                      [63]    [60]
  [6]  [7]                                                      |      /
   |    |                                                      [59]  [58]
  [8]--[9]                                                      |     |
   |    |                                                      [57]--[56]
  [10][11]                                                      |     |
  /     |                                                      [55]  [54]
[12]  [15]                                                      |     |
      / |                                                      [53]--[52]
   [14]-[17]                                                   /  \  /  \
   / |  /  \                                                 [51]-[50]-[49]
[13]-[16]  [19]                                               /
        \     \                                            [47]
        [18]  [21]                                         /
           \  /  \                                      [45]  [46]-[48]
           [20]  [23]                                   /   \ /
              \     \                                [43]  [44]
              [22]  [27]                             /     /
                |    |  >[29]-[31]-[33]-[35]-[39]-[41]   [42]
              [24]  [26]  |         |           \ /  \  /
                     |  >[28]-[30]-[31]-[33]    [38]-[40]
                    [25]                   \      \  /
                                            [36]   [37]