There are 2 shapes on a 8x8 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 (4, 6)
Distance from target shape to pink rectangle at (5, 7): 2
Closest shape is the pink rectangle at (5, 7) with distance 2</think>

<answer>(5, 7)</answer>