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1. We chop the tree with an ax. (Need 2 logs) 2. The resulting long logs are cut with a saw onto the boards. 3. We get 2 heaps of 4 boards. 4. Attempt to combine 2 piles of boards into one. Ps. On the first attempt, you cannot unite.

1. We chop the tree with an ax. (Need 2 wooden logs) 2. The resulting long logs are cut with a saw onto the boards. 3. We get 2 heaps of 4 boards. 4. Attempt to combine 2 piles of boards into one. Ps. On the first attempt, you will not be able to combine, only the second time.

1. We chop the tree with an ax. (Need 2 wooden logs) 2. The resulting long logs are cut with a saw onto the boards. 3. We get 2 heaps of 4 boards. 4. Attempt to combine 2 piles of boards into one. Ps. On the first attempt, you cannot unitewill not be able to combine, only the second time.