There are 6 shapes on a 5x5 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 (1, 1)
Distance from target shape to yellow trapezoid at (4, 1): 3
Distance from target shape to cyan square at (3, 0): 3
Distance from target shape to pink rectangle at (2, 1): 1
Distance from target shape to blue square at (3, 2): 3
Distance from target shape to purple square at (1, 3): 2
Closest shape is the pink rectangle at (2, 1) with distance 1</think>

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