There are 4 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 (2, 3)
Distance from target shape to brown rectangle at (3, 1): 3
Distance from target shape to orange rectangle at (2, 1): 2
Distance from target shape to red right_triangle at (0, 2): 3
Closest shape is the orange rectangle at (2, 1) with distance 2</think>

<answer>(2, 1)</answer>