There are 3 shapes on a 7x7 grid. Which shape is closest to the green 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: green right_triangle at (1, 3)
Distance from target shape to yellow right_triangle at (4, 6): 6
Distance from target shape to orange right_triangle at (0, 1): 3
Closest shape is the orange right_triangle at (0, 1) with distance 3</think>

<answer>(0, 1)</answer>