There are 3 shapes on a 5x5 grid. Which shape is closest to the brown 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: brown right_triangle at (3, 2)
Distance from target shape to purple rectangle at (4, 2): 1
Distance from target shape to blue trapezoid at (3, 4): 2
Closest shape is the purple rectangle at (4, 2) with distance 1</think>

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