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88 2 88 3 88 4 88 5 88 6 88 7 88 8 88 9 89 0 89 1 89 2 89 3 89 4 89 5 89 6 89 7 421 420 419 418 417 416 415 414 413 412 411 410 409 408 407

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