There are 5 shapes on a 10x10 grid. Which shape is closest to the cyan 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: cyan square at (3, 9)
Distance from target shape to gray trapezoid at (8, 0): 14
Distance from target shape to green right_triangle at (2, 8): 2
Distance from target shape to orange trapezoid at (3, 7): 2
Distance from target shape to purple right_triangle at (6, 5): 7
Closest shape is the green right_triangle at (2, 8) with distance 2</think>

<answer>(2, 8)</answer>