There are 4 shapes on a 9x9 grid. Which shape is closest to the gray 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: gray trapezoid at (6, 8)
Distance from target shape to green trapezoid at (7, 3): 6
Distance from target shape to blue right_triangle at (1, 0): 13
Distance from target shape to brown right_triangle at (5, 7): 2
Closest shape is the brown right_triangle at (5, 7) with distance 2</think>

<answer>(5, 7)</answer>