There are 4 shapes on a 5x5 grid. Which shape is closest to the purple right_triangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: purple right_triangle at (1, 1)
Distance from target shape to brown trapezoid at (0, 4): 4
Distance from target shape to gray square at (2, 0): 2
Distance from target shape to green rectangle at (3, 0): 3
Closest shape is the gray square at (2, 0) with distance 2</think>

<answer>(2, 0)</answer>