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

<answer>(2, 0)</answer>