6 into 4: min fragment 2   [v1-66-g4e22cc3]
  Cut up 6 sticks of length 4 like this:
    2 x (4)
    4 x (2 + 2)
  Reassemble as 4 sticks of length 6 like this:
    2 x (4 + 2)
    2 x (2 + 2 + 2)