There are 5 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, 3)
Distance from target shape to red square at (4, 1): 2
Distance from target shape to cyan rectangle at (4, 0): 3
Distance from target shape to brown right_triangle at (1, 4): 4
Distance from target shape to pink square at (3, 1): 3
Closest shape is the red square at (4, 1) with distance 2</think>

<answer>(4, 1)</answer>