There are 6 shapes on a 5x5 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 (3, 4)
Distance from target shape to orange rectangle at (2, 1): 4
Distance from target shape to brown right_triangle at (0, 1): 6
Distance from target shape to blue rectangle at (3, 3): 1
Distance from target shape to yellow trapezoid at (3, 0): 4
Distance from target shape to purple rectangle at (3, 2): 2
Closest shape is the blue rectangle at (3, 3) with distance 1</think>

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