There are 6 shapes on a 7x7 grid. Which shape is closest to the orange 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: orange square at (4, 0)
Distance from target shape to gray square at (1, 4): 7
Distance from target shape to pink trapezoid at (4, 5): 5
Distance from target shape to green trapezoid at (2, 1): 3
Distance from target shape to purple rectangle at (6, 3): 5
Distance from target shape to blue right_triangle at (6, 1): 3
Closest shape is the green trapezoid at (2, 1) with distance 3</think>

<answer>(2, 1)</answer>