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 (2, 2)
Distance from target shape to gray right_triangle at (8, 6): 10
Distance from target shape to green square at (7, 2): 5
Closest shape is the green square at (7, 2) with distance 5</think>

<answer>(7, 2)</answer>