There are 5 shapes on a 9x9 grid. Which shape is closest to the brown 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: brown right_triangle at (8, 2)
Distance from target shape to red right_triangle at (8, 5): 3
Distance from target shape to orange trapezoid at (1, 5): 10
Distance from target shape to cyan right_triangle at (1, 7): 12
Distance from target shape to blue rectangle at (0, 2): 8
Closest shape is the red right_triangle at (8, 5) with distance 3</think>

<answer>(8, 5)</answer>