There are 6 shapes on a 10x10 grid. Which shape is closest to the gray right_triangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: gray right_triangle at (8, 6)
Distance from target shape to orange trapezoid at (9, 1): 6
Distance from target shape to cyan right_triangle at (6, 4): 4
Distance from target shape to yellow trapezoid at (2, 0): 12
Distance from target shape to blue square at (2, 6): 6
Distance from target shape to green square at (6, 7): 3
Closest shape is the green square at (6, 7) with distance 3</think>

<answer>(6, 7)</answer>