There are 5 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 (5, 2)
Distance from target shape to green rectangle at (6, 4): 3
Distance from target shape to gray trapezoid at (2, 6): 7
Distance from target shape to purple square at (8, 0): 5
Distance from target shape to cyan right_triangle at (7, 8): 8
Closest shape is the green rectangle at (6, 4) with distance 3</think>

<answer>(6, 4)</answer>