There are 2 shapes on a 7x7 grid. Which shape is closest to the orange 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: orange right_triangle at (3, 0)
Distance from target shape to pink rectangle at (3, 6): 6
Closest shape is the pink rectangle at (3, 6) with distance 6</think>

<answer>(3, 6)</answer>