There are 3 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 (3, 0)
Distance from target shape to pink rectangle at (4, 0): 1
Distance from target shape to brown trapezoid at (6, 7): 10
Closest shape is the pink rectangle at (4, 0) with distance 1</think>

<answer>(4, 0)</answer>