There are 5 shapes on a 9x9 grid. Which shape is closest to the purple rectangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: purple rectangle at (2, 6)
Distance from target shape to yellow rectangle at (4, 5): 3
Distance from target shape to green rectangle at (5, 6): 3
Distance from target shape to blue rectangle at (8, 8): 8
Distance from target shape to brown rectangle at (1, 4): 3
Closest shape is the yellow rectangle at (4, 5) with distance 3</think>

<answer>(4, 5)</answer>