[Illustration:
+-----+-----+-----+\ | | | | | | G | E | F | | | | | | | +-----+-----+-----+\| | | | | | | H | C | B | | | | | | | +-----+-----+-----+\| | |\____| | | | D || | A | | | || | | | +-----+-----+-----+ | \_________________\|
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Here is a little reminiscence of our old friend the Fifteen Block Puzzle. Eight wooden blocks are lettered, and are placed in a box, as shown in the illustration. It will be seen that you can only move one block at a time to the place vacant for the time being, as no block may be lifted out of the box. The puzzle is to shift them about until you get them in the order--