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74 4 74 5 74 6 74 7 74 8 74 9 75 0 75 1 75 2 75 3 75 4 75 5 75 6 75 7 75 8 75 9 515 514 513 512 511 510 509 508 507 506 505 504 503 502 501

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