There are 3 shapes on a 5x5 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, 0)
Distance from target shape to yellow trapezoid at (4, 3): 5
Distance from target shape to purple square at (2, 1): 1
Closest shape is the purple square at (2, 1) with distance 1</think>

<answer>(2, 1)</answer>