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 (3, 5)
Distance from target shape to green right_triangle at (8, 0): 10
Closest shape is the green right_triangle at (8, 0) with distance 10</think>

<answer>(8, 0)</answer>