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

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