There are 3 shapes on a 9x9 grid. Which shape is closest to the purple square 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 square at (1, 5)
Distance from target shape to cyan square at (5, 0): 9
Distance from target shape to brown trapezoid at (8, 4): 8
Closest shape is the brown trapezoid at (8, 4) with distance 8</think>

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