There are 5 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, 1)
Distance from target shape to yellow right_triangle at (2, 1): 2
Distance from target shape to orange rectangle at (3, 0): 4
Distance from target shape to gray square at (0, 2): 1
Distance from target shape to green square at (0, 0): 1
Closest shape is the gray square at (0, 2) with distance 1</think>

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