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17 7 17 8 17 9 18 0 18 1 18 2 18 3 18 4 18 5 18 6 18 7 1973 1972 1971 1970 1969 1968 1967 1966 1965 1964

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