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26 2 26 3 26 4 26 5 26 6 26 7 26 8 26 9 27 0 27 1 27 2 27 3 27 4 27 5 27 6 27 7 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971 1970 1969 1968 1967 1966

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