There are 3 shapes on a 10x10 grid. Which shape is closest to the cyan rectangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: cyan rectangle at (0, 8)
Distance from target shape to purple right_triangle at (8, 8): 8
Distance from target shape to brown trapezoid at (4, 4): 8
Closest shape is the purple right_triangle at (8, 8) with distance 8</think>

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