There are 5 shapes on a 4x4 grid. Which shape is closest to the brown rectangle 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 rectangle at (1, 2)
Distance from target shape to yellow right_triangle at (0, 2): 1
Distance from target shape to orange right_triangle at (3, 0): 4
Distance from target shape to red rectangle at (3, 1): 3
Distance from target shape to green square at (1, 0): 2
Closest shape is the yellow right_triangle at (0, 2) with distance 1</think>

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