There are 4 shapes on a 9x9 grid. Which shape is closest to the pink 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: pink rectangle at (2, 7)
Distance from target shape to orange right_triangle at (8, 6): 7
Distance from target shape to red rectangle at (1, 5): 3
Distance from target shape to blue rectangle at (4, 1): 8
Closest shape is the red rectangle at (1, 5) with distance 3</think>

<answer>(1, 5)</answer>