There are 3 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 (3, 7)
Distance from target shape to orange trapezoid at (6, 7): 3
Distance from target shape to pink right_triangle at (1, 6): 3
Closest shape is the orange trapezoid at (6, 7) with distance 3</think>

<answer>(6, 7)</answer>