15 into 2: min fragment 1   [v1-66-g4e22cc3]
  Cut up 15 sticks of length 2 like this:
    6 x (2)
    9 x (1 + 1)
  Reassemble as 2 sticks of length 15 like this:
    2 x (2 + 2 + 2 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1)