There are 3 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 (6, 4)
Distance from target shape to green trapezoid at (6, 5): 1
Distance from target shape to red right_triangle at (2, 2): 6
Closest shape is the green trapezoid at (6, 5) with distance 1</think>

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