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72 2 72 3 72 4 72 5 72 6 72 7 72 8 72 9 73 0 73 1 73 2 73 3 73 4 73 5 73 6 73 7 1335 1334 1333 1332 1331 1330 1329 1328 1327 1326 1325 1324 1323 1322 1321

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