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

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