There are 3 shapes on a 6x6 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 (0, 2)
Distance from target shape to blue right_triangle at (3, 0): 5
Distance from target shape to brown rectangle at (0, 5): 3
Closest shape is the brown rectangle at (0, 5) with distance 3</think>

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