There are 6 shapes on a 4x4 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 (0, 0)
Distance from target shape to cyan trapezoid at (2, 1): 3
Distance from target shape to purple square at (3, 2): 5
Distance from target shape to green square at (0, 1): 1
Distance from target shape to brown right_triangle at (3, 1): 4
Distance from target shape to red right_triangle at (0, 3): 3
Closest shape is the green square at (0, 1) with distance 1</think>

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