thorns

                                    e   e    e
 bbbbb b  b  bb  bbb  b   b  bbb   eddddddd e
   b   b  b b  b b  b bb  b b    eeee  e  dd
   b   bbbb b  b bbb  b b b fbb             d
   b   b  b b  b b b  b  bb    b           edf
   b   b  b  bb  b  b b   b bbb              d
                                             ddee
                                           eedd
    bbbb    b     b   bbbbb                  dd
   b    b   b     b     b                    dd
  b         b     b     b            ee     deee
  b         b     b     b        eeee  e   eed
  b    bb   b     b     b        e  ee  eeedd
   b    b    b   bb     b             e  eddeee
    bbbb      bbb b   bbbbb      eeee eeeeeee  ee
                                    eeeeeeeeeee
                                      eeeeeee  e