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15 34 15 35 15 36 15 37 15 38 15 39 15 40 15 41 15 42 15 43 15 44 15 45 15 46 15 47 15 48 15 49 15 50 15 51 15 52 15 53 15 54 15 55 15 56 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971 1970 1969 1968 1967 1966 1965 1964 1963 1962 1961

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