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17 90 17 91 17 92 17 93 17 94 17 95 17 96 17 97 17 98 17 99 18 00 1962 1961 1960 1959 1958 1957 1956 1955 1954 1953

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