There are 2 shapes on a 8x8 grid. Which shape is closest to the red square in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: red square at (3, 4)
Distance from target shape to orange right_triangle at (6, 7): 6
Closest shape is the orange right_triangle at (6, 7) with distance 6</think>

<answer>(6, 7)</answer>