There are 3 shapes on a 9x9 grid. Which shape is closest to the pink 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: pink square at (1, 7)
Distance from target shape to purple right_triangle at (8, 3): 11
Distance from target shape to yellow rectangle at (5, 8): 5
Closest shape is the yellow rectangle at (5, 8) with distance 5</think>

<answer>(5, 8)</answer>