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37 05 37 06 37 07 37 08 37 09 37 10 37 11 37 12 37 13 37 14 37 15 37 16 37 17 37 18 37 19 37 20 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974

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