___
                             1/   \
                              \ 25/
                 +-------------------------------+
                 |                               |
                ___                             ___
              2/   \                          3/   \
               \ 13/                           \ 20/
         +---------------+               +---------------+
         |               |               |               |
        ___             ___             ___             ___
      4/   \          5/   \          6/   \          7/   \
       \  8/           \  7/           \ 17/           \  2/
     +-------+       
     |       |       
    ___     ___     
  8/   \  9/   \
   \  5/   \  4/
    ---     ---     
                               ___
                             1/   \
                              \ 25/
                 +-------------------------------+
                 |                               |
                ___                             ___
              2/   \                          3/   \
               \ 13/                           \ 20/
         +---------------+               +---------------+
         |               |               |               |
        ___             ___             ___             ___
      4/   \          5/   \          6/   \          7/   \
       \  8/           \  7/           \ 17/           \  2/
     +-------+       
     |       |       
    ___     ___     
  8/   \  9/   \
   \  5/   \  4/
    ---     ---     
                               ___
                             1/   \
                              \ 20/
                 +-------------------------------+
                 |                               |
                ___                             ___
              2/   \                          3/   \
               \ 13/                           \ 17/
         +---------------+               +---------------+
         |               |               |               |
        ___             ___             ___             ___
      4/   \          5/   \          6/   \          7/   \
       \  8/           \  7/           \  4/           \  2/
     +-------+       
     |       |       
    ___     ___     
  8/   \  9/   \
   \  5/   \ 25/
    ---     ---     
                               ___
                             1/   \
                              \ 17/
                 +-------------------------------+
                 |                               |
                ___                             ___
              2/   \                          3/   \
               \ 13/                           \  5/
         +---------------+               +---------------+
         |               |               |               |
        ___             ___             ___             ___
      4/   \          5/   \          6/   \          7/   \
       \  8/           \  7/           \  4/           \  2/
     +-------+       
     |       |       
    ___     ___     
  8/   \  9/   \
   \ 20/   \ 25/
    ---     ---     
                               ___
                             1/   \
                              \ 13/
                 +-------------------------------+
                 |                               |
                ___                             ___
              2/   \                          3/   \
               \  8/                           \  5/
         +---------------+               +---------------+
         |               |               |               |
        ___             ___             ___             ___
      4/   \          5/   \          6/   \          7/   \
       \  2/           \  7/           \  4/           \ 17/
     +-------+       
     |       |       
    ___     ___     
  8/   \  9/   \
   \ 20/   \ 25/
    ---     ---     
                               ___
                             1/   \
                              \  8/
                 +-------------------------------+
                 |                               |
                ___                             ___
              2/   \                          3/   \
               \  7/                           \  5/
         +---------------+               +---------------+
         |               |               |               |
        ___             ___             ___             ___
      4/   \          5/   \          6/   \          7/   \
       \  2/           \  4/           \ 13/           \ 17/
     +-------+       
     |       |       
    ___     ___     
  8/   \  9/   \
   \ 20/   \ 25/
    ---     ---     
                               ___
                             1/   \
                              \  7/
                 +-------------------------------+
                 |                               |
                ___                             ___
              2/   \                          3/   \
               \  4/                           \  5/
         +---------------+               +---------------+
         |               |               |               |
        ___             ___             ___             ___
      4/   \          5/   \          6/   \          7/   \
       \  2/           \  8/           \ 13/           \ 17/
     +-------+       
     |       |       
    ___     ___     
  8/   \  9/   \
   \ 20/   \ 25/
    ---     ---     
                               ___
                             1/   \
                              \  5/
                 +-------------------------------+
                 |                               |
                ___                             ___
              2/   \                          3/   \
               \  4/                           \  2/
         +---------------+               +---------------+
         |               |               |               |
        ___             ___             ___             ___
      4/   \          5/   \          6/   \          7/   \
       \  7/           \  8/           \ 13/           \ 17/
     +-------+       
     |       |       
    ___     ___     
  8/   \  9/   \
   \ 20/   \ 25/
    ---     ---     
                               ___
                             1/   \
                              \  4/
                 +-------------------------------+
                 |                               |
                ___                             ___
              2/   \                          3/   \
               \  2/                           \  5/
         +---------------+               +---------------+
         |               |               |               |
        ___             ___             ___             ___
      4/   \          5/   \          6/   \          7/   \
       \  7/           \  8/           \ 13/           \ 17/
     +-------+       
     |       |       
    ___     ___     
  8/   \  9/   \
   \ 20/   \ 25/
    ---     ---     
                               ___
                             1/   \
                              \  2/
                 +-------------------------------+
                 |                               |
                ___                             ___
              2/   \                          3/   \
               \  4/                           \  5/
         +---------------+               +---------------+
         |               |               |               |
        ___             ___             ___             ___
      4/   \          5/   \          6/   \          7/   \
       \  7/           \  8/           \ 13/           \ 17/
     +-------+       
     |       |       
    ___     ___     
  8/   \  9/   \
   \ 20/   \ 25/
    ---     ---