There are 5 shapes on a 6x6 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 (4, 0)
Distance from target shape to red right_triangle at (1, 5): 8
Distance from target shape to purple right_triangle at (1, 1): 4
Distance from target shape to pink square at (3, 3): 4
Distance from target shape to blue rectangle at (5, 4): 5
Closest shape is the purple right_triangle at (1, 1) with distance 4</think>

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