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36 72 36 73 36 74 36 75 36 76 36 77 36 78 36 79 36 80 36 81 36 82 36 83 36 84 36 85 36 86 36 87 36 88 36 89 36 90 36 91 36 92 36 93 36 94 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971

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