There are 6 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 (3, 3)
Distance from target shape to green square at (8, 0): 8
Distance from target shape to orange square at (3, 1): 2
Distance from target shape to purple right_triangle at (7, 2): 5
Distance from target shape to cyan trapezoid at (6, 0): 6
Distance from target shape to gray right_triangle at (0, 8): 8
Closest shape is the orange square at (3, 1) with distance 2</think>

<answer>(3, 1)</answer>