There are 4 shapes on a 10x10 grid. Which shape is closest to the blue 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: blue rectangle at (4, 8)
Distance from target shape to pink right_triangle at (6, 1): 9
Distance from target shape to orange square at (9, 6): 7
Distance from target shape to brown trapezoid at (5, 7): 2
Closest shape is the brown trapezoid at (5, 7) with distance 2</think>

<answer>(5, 7)</answer>