There are 3 shapes on a 8x8 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 (4, 7)
Distance from target shape to purple trapezoid at (6, 7): 2
Distance from target shape to cyan trapezoid at (3, 7): 1
Closest shape is the cyan trapezoid at (3, 7) with distance 1</think>

<answer>(3, 7)</answer>