There are 3 shapes on a 4x4 grid. Which shape is closest to the green square 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 square at (1, 2)
Distance from target shape to orange trapezoid at (3, 3): 3
Distance from target shape to gray rectangle at (2, 2): 1
Closest shape is the gray rectangle at (2, 2) with distance 1</think>

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