There are 3 shapes on a 9x9 grid. Which shape is closest to the red 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: red trapezoid at (3, 5)
Distance from target shape to gray rectangle at (4, 5): 1
Distance from target shape to green trapezoid at (6, 5): 3
Closest shape is the gray rectangle at (4, 5) with distance 1</think>

<answer>(4, 5)</answer>