There are 6 shapes on a 10x10 grid. Which shape is closest to the orange 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: orange right_triangle at (9, 5)
Distance from target shape to purple trapezoid at (3, 1): 10
Distance from target shape to green right_triangle at (2, 4): 8
Distance from target shape to red trapezoid at (5, 9): 8
Distance from target shape to pink square at (1, 8): 11
Distance from target shape to brown trapezoid at (8, 4): 2
Closest shape is the brown trapezoid at (8, 4) with distance 2</think>

<answer>(8, 4)</answer>