There are 3 shapes on a 9x9 grid. Which shape is closest to the gray 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: gray rectangle at (2, 1)
Distance from target shape to brown right_triangle at (6, 5): 8
Distance from target shape to cyan rectangle at (6, 7): 10
Closest shape is the brown right_triangle at (6, 5) with distance 8</think>

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