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 (1, 9)
Distance from target shape to purple square at (0, 2): 8
Distance from target shape to blue rectangle at (0, 4): 6
Distance from target shape to red trapezoid at (3, 3): 8
Closest shape is the blue rectangle at (0, 4) with distance 6</think>

<answer>(0, 4)</answer>