There are 4 shapes on a 9x9 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 (6, 3)
Distance from target shape to yellow rectangle at (8, 1): 4
Distance from target shape to blue square at (6, 8): 5
Distance from target shape to pink rectangle at (3, 6): 6
Closest shape is the yellow rectangle at (8, 1) with distance 4</think>

<answer>(8, 1)</answer>