There are 3 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 (1, 8)
Distance from target shape to green trapezoid at (5, 5): 7
Distance from target shape to gray square at (2, 8): 1
Closest shape is the gray square at (2, 8) with distance 1</think>

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