18 into 4: min fragment 2   [v1-66-g4e22cc3]
  Cut up 18 sticks of length 4 like this:
    16 x (4)
    2 x (2 + 2)
  Reassemble as 4 sticks of length 18 like this:
    4 x (4 + 4 + 4 + 4 + 2)