Rotate the blocks such that the letter A through I show up on each side of the snake. No letter can be repeated on a side. A unique Creative Crafthouse designed puzzle with Alpha logic by Ken Irvine of New Jersey. The snake is a bit over 5" in length and stays in one piece. The blocks are deeply and permanently laser engraved. They turn on a strong nylon bungee cord. The 7 block model here has over 4000 permutations. We believe there is 1 correct solution, though that is not verified yet.