There are 4 shapes on a 9x9 grid. Which shape is closest to the blue 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: blue rectangle at (5, 0)
Distance from target shape to pink right_triangle at (2, 3): 6
Distance from target shape to cyan rectangle at (5, 8): 8
Distance from target shape to green square at (1, 6): 10
Closest shape is the pink right_triangle at (2, 3) with distance 6</think>

<answer>(2, 3)</answer>