There are 6 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 (2, 2)
Distance from target shape to cyan square at (1, 3): 2
Distance from target shape to gray trapezoid at (1, 2): 1
Distance from target shape to pink rectangle at (3, 1): 2
Distance from target shape to purple right_triangle at (2, 3): 1
Distance from target shape to brown trapezoid at (3, 3): 2
Closest shape is the gray trapezoid at (1, 2) with distance 1</think>

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