There are 4 shapes on a 8x8 grid. Which shape is closest to the orange 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: orange rectangle at (5, 5)
Distance from target shape to purple right_triangle at (4, 1): 5
Distance from target shape to red trapezoid at (3, 5): 2
Distance from target shape to cyan trapezoid at (4, 3): 3
Closest shape is the red trapezoid at (3, 5) with distance 2</think>

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