There are 3 shapes on a 7x7 grid. Which shape is closest to the pink 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: pink rectangle at (2, 6)
Distance from target shape to blue rectangle at (4, 0): 8
Distance from target shape to yellow trapezoid at (5, 1): 8
Closest shape is the blue rectangle at (4, 0) with distance 8</think>

<answer>(4, 0)</answer>