There are 3 shapes on a 9x9 grid. Which shape is closest to the orange 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: orange square at (5, 5)
Distance from target shape to gray rectangle at (1, 5): 4
Distance from target shape to purple right_triangle at (1, 8): 7
Closest shape is the gray rectangle at (1, 5) with distance 4</think>

<answer>(1, 5)</answer>