There are 6 shapes on a 4x4 grid. Which shape is closest to the red 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: red trapezoid at (3, 1)
Distance from target shape to orange right_triangle at (2, 2): 2
Distance from target shape to green right_triangle at (0, 2): 4
Distance from target shape to pink trapezoid at (1, 2): 3
Distance from target shape to cyan trapezoid at (1, 0): 3
Distance from target shape to blue rectangle at (1, 1): 2
Closest shape is the orange right_triangle at (2, 2) with distance 2</think>

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