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14 12 14 13 14 14 14 15 14 16 14 17 14 18 14 19 14 20 14 21 14 22 1977 1976 1975 1974 1973 1972 1971 1970 1969 1968

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