There are 3 shapes on a 7x7 grid. Which shape is closest to the red 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: red rectangle at (0, 0)
Distance from target shape to cyan rectangle at (5, 5): 10
Distance from target shape to orange right_triangle at (2, 6): 8
Closest shape is the orange right_triangle at (2, 6) with distance 8</think>

<answer>(2, 6)</answer>