|
 5 +  F-----------E
   |  |           |
 4 +  |           |
   |  |           |
 3 +  |  C--------D
   |  |  |
 2 +  |  |
   |  |  |
 1 +  A--B
   |
   +--+--+--+--+--+--
      1  2  3  4  5