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26 9 27 0 27 1 27 2 27 3 27 4 27 5 27 6 27 7 27 8 27 9 1977 1976 1975 1974 1973 1972 1971 1970 1969 1968

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