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, 6)
Distance from target shape to cyan rectangle at (3, 7): 4
Distance from target shape to red right_triangle at (6, 5): 7
Distance from target shape to brown square at (6, 9): 9
Distance from target shape to pink rectangle at (8, 3): 11
Distance from target shape to blue right_triangle at (7, 9): 10
Closest shape is the cyan rectangle at (3, 7) with distance 4</think>

<answer>(3, 7)</answer>