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54 4 54 5 54 6 54 7 54 8 54 9 55 0 55 1 55 2 55 3 55 4 2291 2290 2289 2288 2287 2286 2285 2284 2283 2282

= Free Coordinate    = Occupied(Single Region)     = Occupied (Var Region)     = Center of the grid