There are 6 shapes on a 9x9 grid. Which shape is closest to the gray 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: gray square at (5, 2)
Distance from target shape to red right_triangle at (5, 6): 4
Distance from target shape to orange trapezoid at (4, 3): 2
Distance from target shape to yellow square at (5, 8): 6
Distance from target shape to purple right_triangle at (2, 1): 4
Distance from target shape to cyan trapezoid at (6, 6): 5
Closest shape is the orange trapezoid at (4, 3) with distance 2</think>

<answer>(4, 3)</answer>