There are 5 shapes on a 7x7 grid. Which shape is closest to the orange square 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 square at (1, 5)
Distance from target shape to yellow right_triangle at (3, 5): 2
Distance from target shape to cyan square at (2, 6): 2
Distance from target shape to red rectangle at (1, 2): 3
Distance from target shape to blue right_triangle at (6, 5): 5
Closest shape is the yellow right_triangle at (3, 5) with distance 2</think>

<answer>(3, 5)</answer>