There are 3 shapes on a 9x9 grid. Which shape is closest to the red square in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: red square at (2, 7)
Distance from target shape to brown rectangle at (6, 4): 7
Distance from target shape to green square at (7, 0): 12
Closest shape is the brown rectangle at (6, 4) with distance 7</think>

<answer>(6, 4)</answer>