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

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