There are 5 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 (8, 1)
Distance from target shape to brown trapezoid at (7, 2): 2
Distance from target shape to pink rectangle at (4, 1): 4
Distance from target shape to yellow rectangle at (6, 8): 9
Distance from target shape to red square at (6, 7): 8
Closest shape is the brown trapezoid at (7, 2) with distance 2</think>

<answer>(7, 2)</answer>