There are 3 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 (7, 5)
Distance from target shape to green square at (1, 4): 7
Distance from target shape to red right_triangle at (6, 5): 1
Closest shape is the red right_triangle at (6, 5) with distance 1</think>

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