There are 4 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 (7, 4)
Distance from target shape to orange rectangle at (3, 3): 5
Distance from target shape to purple rectangle at (8, 6): 3
Distance from target shape to yellow trapezoid at (9, 6): 4
Closest shape is the purple rectangle at (8, 6) with distance 3</think>

<answer>(8, 6)</answer>