There are 3 shapes on a 9x9 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 (0, 4)
Distance from target shape to brown rectangle at (5, 1): 8
Distance from target shape to cyan rectangle at (6, 4): 6
Closest shape is the cyan rectangle at (6, 4) with distance 6</think>

<answer>(6, 4)</answer>