There are 6 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 (2, 1)
Distance from target shape to red square at (2, 2): 1
Distance from target shape to yellow square at (2, 0): 1
Distance from target shape to purple square at (3, 1): 1
Distance from target shape to gray right_triangle at (3, 3): 3
Distance from target shape to orange right_triangle at (3, 0): 2
Closest shape is the red square at (2, 2) with distance 1</think>

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