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 (7, 6)
Distance from target shape to yellow trapezoid at (3, 3): 7
Distance from target shape to orange rectangle at (7, 9): 3
Distance from target shape to red trapezoid at (6, 9): 4
Distance from target shape to gray right_triangle at (6, 1): 6
Closest shape is the orange rectangle at (7, 9) with distance 3</think>

<answer>(7, 9)</answer>