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81 86 81 87 81 88 81 89 81 90 81 91 81 92 81 93 81 94 81 95 81 96 7171 7170 7169 7168 7167 7166 7165 7164 7163 7162

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