There are 5 shapes on a 9x9 grid. Which shape is closest to the brown trapezoid 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 trapezoid at (2, 8)
Distance from target shape to blue right_triangle at (1, 6): 3
Distance from target shape to red right_triangle at (4, 2): 8
Distance from target shape to green square at (3, 2): 7
Distance from target shape to gray right_triangle at (0, 0): 10
Closest shape is the blue right_triangle at (1, 6) with distance 3</think>

<answer>(1, 6)</answer>