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 (5, 5)
Distance from target shape to blue trapezoid at (2, 3): 5
Distance from target shape to pink right_triangle at (6, 2): 4
Closest shape is the pink right_triangle at (6, 2) with distance 4</think>

<answer>(6, 2)</answer>