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71 6 71 7 71 8 71 9 72 0 72 1 72 2 72 3 72 4 72 5 72 6 72 7 72 8 72 9 73 0 73 1 1315 1314 1313 1312 1311 1310 1309 1308 1307 1306 1305 1304 1303 1302 1301

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