There are 2 shapes on a 8x8 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, 6)
Distance from target shape to green rectangle at (1, 1): 9
Closest shape is the green rectangle at (1, 1) with distance 9</think>

<answer>(1, 1)</answer>