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13 93 4 13 93 5 13 93 6 13 93 7 13 93 8 13 93 9 13 94 0 13 94 1 13 94 2 13 94 3 13 94 4 13 94 5 13 94 6 13 94 7 13 94 8 13 94 9 31989 31988 31987 31986 31985 31984 31983 31982 31981 31980 31979 31978 31977 31976 31975

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