There are 5 shapes on a 8x8 grid. Which shape is closest to the pink 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: pink square at (1, 7)
Distance from target shape to brown square at (7, 0): 13
Distance from target shape to blue right_triangle at (1, 0): 7
Distance from target shape to green rectangle at (0, 6): 2
Distance from target shape to yellow right_triangle at (1, 2): 5
Closest shape is the green rectangle at (0, 6) with distance 2</think>

<answer>(0, 6)</answer>