There are 4 shapes on a 10x10 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 (0, 9)
Distance from target shape to red right_triangle at (7, 9): 7
Distance from target shape to yellow trapezoid at (4, 3): 10
Distance from target shape to brown rectangle at (1, 8): 2
Closest shape is the brown rectangle at (1, 8) with distance 2</think>

<answer>(1, 8)</answer>