There are 6 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 red trapezoid at (4, 1): 2
Distance from target shape to purple trapezoid at (3, 0): 2
Distance from target shape to pink right_triangle at (1, 1): 3
Distance from target shape to yellow trapezoid at (4, 0): 3
Distance from target shape to gray rectangle at (4, 2): 1
Closest shape is the gray rectangle at (4, 2) with distance 1</think>

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