There are 4 shapes on a 8x8 grid. Which shape is closest to the green 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: green right_triangle at (2, 5)
Distance from target shape to yellow right_triangle at (5, 7): 5
Distance from target shape to cyan trapezoid at (0, 2): 5
Distance from target shape to blue right_triangle at (0, 5): 2
Closest shape is the blue right_triangle at (0, 5) with distance 2</think>

<answer>(0, 5)</answer>