There are 4 shapes on a 9x9 grid. Which shape is closest to the blue 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: blue square at (6, 5)
Distance from target shape to orange square at (2, 7): 6
Distance from target shape to gray rectangle at (5, 6): 2
Distance from target shape to yellow rectangle at (7, 4): 2
Closest shape is the gray rectangle at (5, 6) with distance 2</think>

<answer>(5, 6)</answer>