There are 2 shapes on a 10x10 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 (2, 6)
Distance from target shape to green rectangle at (2, 0): 6
Closest shape is the green rectangle at (2, 0) with distance 6</think>

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