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 (2, 1)
Distance from target shape to brown right_triangle at (5, 3): 5
Distance from target shape to pink rectangle at (6, 2): 5
Distance from target shape to purple rectangle at (4, 9): 10
Distance from target shape to red square at (3, 9): 9
Closest shape is the brown right_triangle at (5, 3) with distance 5</think>

<answer>(5, 3)</answer>