What changes at every step
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Step 1JAWS -> CAWS
Tile 1 changes J to C; the move is sideways by letter shape. CAWS has 16 legal neighbors, 1 shortest continuation, and 4 moves remaining. Other legal exits from JAWS include LAWS, SAWS, JAYS, JAMS.
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Step 2CAWS -> COWS
Tile 2 changes A to O; the move is closer by letter shape. COWS has 17 legal neighbors, 1 shortest continuation, and 3 moves remaining. Other legal exits from CAWS include CATS, CAPS, CAMS, CANS.
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Step 3COWS -> COOS
Tile 3 changes W to O; the move is closer by letter shape. COOS has 15 legal neighbors, 1 shortest continuation, and 2 moves remaining. Other legal exits from COWS include CONS, COPS, BOWS, COTS.
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Step 4COOS -> COOP
Tile 4 changes S to P; the move is closer by letter shape. COOP has 14 legal neighbors, 1 shortest continuation, and 1 move remaining. Other legal exits from COOS include COOL, COOK, BOOS, COOT.
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Step 5COOP -> POOP
Tile 1 changes C to P; the move is closer by letter shape. POOP has 11 legal neighbors, target reached, and 0 moves remaining. Other legal exits from COOP include LOOP, HOOP, BOOP, GOOP.