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+21 into 17 best min fragment found: 6
+ Cut up 21 sticks of length 17 like this:
+ 3 x (8 + 9)
+ 9 x (7 + 10)
+ 9 x (6 + 11)
+ Reassemble as 17 sticks of length 21 like this:
+ 9 x (10 + 11)
+ 2 x (7 + 7 + 7)
+ 3 x (6 + 7 + 8)
+ 3 x (6 + 6 + 9)