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

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