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

<answer>(4, 3)</answer>