There are 2 shapes on a 7x7 grid. Which shape is closest to the blue 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: blue right_triangle at (1, 1)
Distance from target shape to red right_triangle at (5, 6): 9
Closest shape is the red right_triangle at (5, 6) with distance 9</think>

<answer>(5, 6)</answer>