There are 2 shapes on a 10x10 grid. Which shape is closest to the purple 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: purple trapezoid at (5, 1)
Distance from target shape to green rectangle at (8, 4): 6
Closest shape is the green rectangle at (8, 4) with distance 6</think>

<answer>(8, 4)</answer>