There are 4 shapes on a 10x10 grid. Which shape is closest to the red rectangle 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 rectangle at (6, 9)
Distance from target shape to brown trapezoid at (5, 6): 4
Distance from target shape to pink trapezoid at (3, 7): 5
Distance from target shape to gray trapezoid at (9, 2): 10
Closest shape is the brown trapezoid at (5, 6) with distance 4</think>

<answer>(5, 6)</answer>