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 (0, 0)
Distance from target shape to blue trapezoid at (3, 0): 3
Distance from target shape to red trapezoid at (0, 5): 5
Closest shape is the blue trapezoid at (3, 0) with distance 3</think>

<answer>(3, 0)</answer>