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

<answer>(4, 2)</answer>