There are 2 shapes on a 7x7 grid. Which shape is closest to the blue trapezoid in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: blue trapezoid at (1, 5)
Distance from target shape to purple rectangle at (3, 0): 7
Closest shape is the purple rectangle at (3, 0) with distance 7</think>

<answer>(3, 0)</answer>