There are 6 shapes on a 9x9 grid. Which shape is closest to the red 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: red rectangle at (6, 5)
Distance from target shape to cyan square at (3, 5): 3
Distance from target shape to purple square at (7, 3): 3
Distance from target shape to orange rectangle at (2, 7): 6
Distance from target shape to green right_triangle at (1, 8): 8
Distance from target shape to pink rectangle at (1, 2): 8
Closest shape is the cyan square at (3, 5) with distance 3</think>

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