There are 6 shapes on a 10x10 grid. Which shape is closest to the green 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: green square at (8, 7)
Distance from target shape to purple trapezoid at (6, 4): 5
Distance from target shape to red square at (7, 1): 7
Distance from target shape to brown trapezoid at (3, 8): 6
Distance from target shape to yellow right_triangle at (1, 9): 9
Distance from target shape to cyan rectangle at (6, 8): 3
Closest shape is the cyan rectangle at (6, 8) with distance 3</think>

<answer>(6, 8)</answer>