There are 4 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 (2, 7)
Distance from target shape to gray right_triangle at (0, 6): 3
Distance from target shape to orange trapezoid at (5, 0): 10
Distance from target shape to cyan rectangle at (2, 1): 6
Closest shape is the gray right_triangle at (0, 6) with distance 3</think>

<answer>(0, 6)</answer>