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

<answer>(3, 3)</answer>