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62 9 63 0 63 1 63 2 63 3 63 4 63 5 63 6 63 7 63 8 63 9 64 0 64 1 64 2 64 3 64 4 1976 1975 1974 1973 1972 1971 1970 1969 1968 1967 1966 1965 1964 1963 1962

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