There are 6 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 (0, 8)
Distance from target shape to brown trapezoid at (4, 4): 8
Distance from target shape to orange square at (5, 9): 6
Distance from target shape to purple right_triangle at (0, 7): 1
Distance from target shape to blue trapezoid at (8, 1): 15
Distance from target shape to green right_triangle at (5, 6): 7
Closest shape is the purple right_triangle at (0, 7) with distance 1</think>

<answer>(0, 7)</answer>