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

<answer>(4, 3)</answer>