There are 6 shapes on a 10x10 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 (0, 8)
Distance from target shape to orange square at (1, 5): 4
Distance from target shape to green square at (1, 7): 2
Distance from target shape to cyan right_triangle at (8, 2): 14
Distance from target shape to pink right_triangle at (3, 4): 7
Distance from target shape to gray square at (7, 9): 8
Closest shape is the green square at (1, 7) with distance 2</think>

<answer>(1, 7)</answer>