There are 3 shapes on a 5x5 grid. Which shape is closest to the gray trapezoid in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: gray trapezoid at (4, 3)
Distance from target shape to pink rectangle at (3, 1): 3
Distance from target shape to brown rectangle at (2, 4): 3
Closest shape is the pink rectangle at (3, 1) with distance 3</think>

<answer>(3, 1)</answer>