There are 6 shapes on a 10x10 grid. Which shape is closest to the pink right_triangle 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 right_triangle at (2, 4)
Distance from target shape to blue square at (5, 2): 5
Distance from target shape to gray trapezoid at (2, 8): 4
Distance from target shape to green square at (9, 4): 7
Distance from target shape to purple rectangle at (4, 3): 3
Distance from target shape to orange rectangle at (2, 1): 3
Closest shape is the purple rectangle at (4, 3) with distance 3</think>

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