There are 5 shapes on a 7x7 grid. Which shape is closest to the red 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: red rectangle at (6, 0)
Distance from target shape to purple right_triangle at (4, 6): 8
Distance from target shape to pink right_triangle at (0, 2): 8
Distance from target shape to yellow rectangle at (0, 3): 9
Distance from target shape to orange trapezoid at (3, 3): 6
Closest shape is the orange trapezoid at (3, 3) with distance 6</think>

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