There are 6 shapes on a 9x9 grid. Which shape is closest to the red 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: red rectangle at (2, 1)
Distance from target shape to pink rectangle at (3, 0): 2
Distance from target shape to gray rectangle at (2, 8): 7
Distance from target shape to cyan rectangle at (5, 6): 8
Distance from target shape to blue rectangle at (7, 8): 12
Distance from target shape to green trapezoid at (2, 5): 4
Closest shape is the pink rectangle at (3, 0) with distance 2</think>

<answer>(3, 0)</answer>