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

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