There are 5 shapes on a 9x9 grid. Which shape is closest to the blue 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: blue trapezoid at (5, 8)
Distance from target shape to cyan right_triangle at (1, 2): 10
Distance from target shape to yellow rectangle at (5, 6): 2
Distance from target shape to purple rectangle at (7, 0): 10
Distance from target shape to brown right_triangle at (8, 8): 3
Closest shape is the yellow rectangle at (5, 6) with distance 2</think>

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