table.tents_board td { width: 8%; height: 8%; text-align: center; vertical-align: middle; background-color: #dddddd; } table.tents_board img { width: 100%; height: 100%; align: middle; } table.tents_board td.inconsistent { background-color: #ffcccc; }

Place a tent right above, below, or to the side of each tree such that it is not adjacent to any other tent.

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