There are 4 shapes on a 3x3 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 (1, 1)
Distance from target shape to purple trapezoid at (0, 1): 1
Distance from target shape to blue rectangle at (1, 0): 1
Distance from target shape to pink square at (2, 1): 1
Closest shape is the purple trapezoid at (0, 1) with distance 1</think>

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