There are 4 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 (2, 2)
Distance from target shape to pink right_triangle at (3, 0): 3
Distance from target shape to gray right_triangle at (2, 1): 1
Distance from target shape to yellow right_triangle at (0, 2): 2
Closest shape is the gray right_triangle at (2, 1) with distance 1</think>

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