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

<answer>(3, 1)</answer>