There are 3 shapes on a 9x9 grid. Which shape is closest to the purple 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: purple square at (7, 7)
Distance from target shape to yellow rectangle at (7, 2): 5
Distance from target shape to pink square at (7, 4): 3
Closest shape is the pink square at (7, 4) with distance 3</think>

<answer>(7, 4)</answer>