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72 4 72 5 72 6 72 7 72 8 72 9 73 0 73 1 73 2 73 3 73 4 1392 1391 1390 1389 1388 1387 1386 1385 1384 1383

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