There are 3 shapes on a 4x4 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 (3, 3)
Distance from target shape to gray right_triangle at (3, 2): 1
Distance from target shape to cyan right_triangle at (1, 3): 2
Closest shape is the gray right_triangle at (3, 2) with distance 1</think>

<answer>(3, 2)</answer>