Coordinate X: Y: Search

71 90 71 91 71 92 71 93 71 94 71 95 71 96 71 97 71 98 71 99 72 00 72 01 72 02 72 03 72 04 72 05 72 06 72 07 72 08 72 09 72 10 72 11 72 12 72 13 72 14 72 15 72 16 72 17 72 18 72 19 72 20 1989 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