There are 4 shapes on a 10x10 grid. Which shape is closest to the blue 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: blue right_triangle at (9, 5)
Distance from target shape to purple square at (2, 5): 7
Distance from target shape to orange right_triangle at (0, 5): 9
Distance from target shape to brown right_triangle at (0, 3): 11
Closest shape is the purple square at (2, 5) with distance 7</think>

<answer>(2, 5)</answer>