There are 4 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 (6, 5)
Distance from target shape to red square at (7, 6): 2
Distance from target shape to purple right_triangle at (4, 5): 2
Distance from target shape to brown trapezoid at (5, 2): 4
Closest shape is the red square at (7, 6) with distance 2</think>

<answer>(7, 6)</answer>