What changes at every step
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Step 1LAWN -> LAIN
Tile 3 changes W to I; the move is sideways by letter shape. LAIN has 10 legal neighbors, 1 shortest continuation, and 4 moves remaining. Other legal exits from LAWN include LAWS, DAWN, SAWN, PAWN.
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Step 2LAIN -> LOIN
Tile 2 changes A to O; the move is closer by letter shape. LOIN has 5 legal neighbors, 1 shortest continuation, and 3 moves remaining. Other legal exits from LAIN include MAIN, PAIN, GAIN, RAIN.
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Step 3LOIN -> LOON
Tile 3 changes I to O; the move is closer by letter shape. LOON has 13 legal neighbors, 1 shortest continuation, and 2 moves remaining. Other legal exits from LOIN include LOAN, JOIN, COIN.
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Step 4LOON -> LOOP
Tile 4 changes N to P; the move is closer by letter shape. LOOP has 9 legal neighbors, 1 shortest continuation, and 1 move remaining. Other legal exits from LOON include LOOK, LOOM, BOON, LOOT.
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Step 5LOOP -> POOP
Tile 1 changes L to P; the move is closer by letter shape. POOP has 11 legal neighbors, target reached, and 0 moves remaining. Other legal exits from LOOP include COOP, HOOP, BOOP, GOOP.