There are 5 shapes on a 4x4 grid. Which shape is closest to the brown rectangle 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 rectangle at (3, 3)
Distance from target shape to purple rectangle at (1, 3): 2
Distance from target shape to pink right_triangle at (0, 0): 6
Distance from target shape to gray right_triangle at (1, 0): 5
Distance from target shape to orange trapezoid at (3, 2): 1
Closest shape is the orange trapezoid at (3, 2) with distance 1</think>

<answer>(3, 2)</answer>