There are 4 shapes on a 10x10 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 (6, 5)
Distance from target shape to blue square at (4, 7): 4
Distance from target shape to brown right_triangle at (3, 5): 3
Distance from target shape to orange right_triangle at (8, 8): 5
Closest shape is the brown right_triangle at (3, 5) with distance 3</think>

<answer>(3, 5)</answer>