There are 2 shapes on a 9x9 grid. Which shape is closest to the green 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: green trapezoid at (4, 6)
Distance from target shape to purple rectangle at (6, 3): 5
Closest shape is the purple rectangle at (6, 3) with distance 5</think>

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