There are 5 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 (1, 0)
Distance from target shape to blue trapezoid at (1, 3): 3
Distance from target shape to yellow trapezoid at (0, 5): 6
Distance from target shape to red square at (7, 1): 7
Distance from target shape to green rectangle at (6, 7): 12
Closest shape is the blue trapezoid at (1, 3) with distance 3</think>

<answer>(1, 3)</answer>