There are 5 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 (7, 4)
Distance from target shape to red trapezoid at (3, 4): 4
Distance from target shape to orange right_triangle at (0, 4): 7
Distance from target shape to purple rectangle at (5, 7): 5
Distance from target shape to green square at (5, 1): 5
Closest shape is the red trapezoid at (3, 4) with distance 4</think>

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