There are 5 shapes on a 5x5 grid. Which shape is closest to the pink 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: pink trapezoid at (4, 1)
Distance from target shape to brown trapezoid at (4, 4): 3
Distance from target shape to gray right_triangle at (2, 0): 3
Distance from target shape to red right_triangle at (2, 1): 2
Distance from target shape to purple trapezoid at (2, 4): 5
Closest shape is the red right_triangle at (2, 1) with distance 2</think>

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