There are 3 shapes on a 9x9 grid. Which shape is closest to the yellow 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: yellow trapezoid at (5, 3)
Distance from target shape to red right_triangle at (6, 7): 5
Distance from target shape to pink right_triangle at (6, 3): 1
Closest shape is the pink right_triangle at (6, 3) with distance 1</think>

<answer>(6, 3)</answer>