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12 56 12 57 12 58 12 59 12 60 12 61 12 62 12 63 12 64 12 65 12 66 12 67 12 68 12 69 12 70 12 71 12 72 12 73 12 74 12 75 12 76 12 77 12 78 492 491 490 489 488 487 486 485 484 483 482 481 480 479 478 477 476 475 474 473 472 471

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