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Level AB5 seems impossible. 

This is because:

1. You need the bomb near the button to press the button to keep the raised blocks raised up and be in place to destroy the square block in between the right movement and upward movement block.
   1. You can't replace the bomb because that would mean the path to the exit is blocked, or you are not able to use the block combining machine to combine the right and upper movement blocks because the bomb would explode the button in any position in the way it was used to move a block up.
      1. Also, the best bomb to use for that would be the one by the bomb, because using the one by the left would mean you would not be able to get the right and upward movement blocks pushed to the right by the expanding blocks in the lower right corner because the bomb explodes the button.

This means that the bomb near the button would be needed to be in multiple places at the same time.