There are 5 shapes on a 10x10 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 (0, 8)
Distance from target shape to blue square at (8, 7): 9
Distance from target shape to green square at (9, 6): 11
Distance from target shape to red rectangle at (1, 6): 3
Distance from target shape to purple right_triangle at (7, 5): 10
Closest shape is the red rectangle at (1, 6) with distance 3</think>

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