There are 4 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 (4, 4)
Distance from target shape to blue trapezoid at (1, 0): 7
Distance from target shape to red square at (1, 3): 4
Distance from target shape to green rectangle at (2, 4): 2
Closest shape is the green rectangle at (2, 4) with distance 2</think>

<answer>(2, 4)</answer>