There are 5 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, 5)
Distance from target shape to yellow trapezoid at (6, 5): 6
Distance from target shape to orange right_triangle at (1, 5): 1
Distance from target shape to pink trapezoid at (2, 0): 7
Distance from target shape to purple square at (2, 3): 4
Closest shape is the orange right_triangle at (1, 5) with distance 1</think>

<answer>(1, 5)</answer>