There are 3 shapes on a 9x9 grid. Which shape is closest to the cyan 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: cyan trapezoid at (7, 8)
Distance from target shape to purple right_triangle at (6, 8): 1
Distance from target shape to blue trapezoid at (1, 3): 11
Closest shape is the purple right_triangle at (6, 8) with distance 1</think>

<answer>(6, 8)</answer>