There are 4 shapes on a 10x10 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 (8, 6)
Distance from target shape to brown right_triangle at (3, 4): 7
Distance from target shape to purple trapezoid at (4, 4): 6
Distance from target shape to pink trapezoid at (4, 0): 10
Closest shape is the purple trapezoid at (4, 4) with distance 6</think>

<answer>(4, 4)</answer>