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72 5 72 6 72 7 72 8 72 9 73 0 73 1 73 2 73 3 73 4 73 5 3975 3974 3973 3972 3971 3970 3969 3968 3967 3966

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