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15 88 15 89 15 90 15 91 15 92 15 93 15 94 15 95 15 96 15 97 15 98 15 99 16 00 16 01 16 02 16 03 16 04 16 05 16 06 16 07 16 08 16 09 16 10 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971 1970 1969 1968 1967 1966 1965 1964 1963

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