There are 5 shapes on a 8x8 grid. Which shape is closest to the yellow square 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 square at (5, 7)
Distance from target shape to purple trapezoid at (5, 2): 5
Distance from target shape to cyan trapezoid at (2, 3): 7
Distance from target shape to pink trapezoid at (7, 7): 2
Distance from target shape to brown rectangle at (3, 4): 5
Closest shape is the pink trapezoid at (7, 7) with distance 2</think>

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