There are 6 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 (0, 0)
Distance from target shape to yellow rectangle at (2, 1): 3
Distance from target shape to pink trapezoid at (3, 2): 5
Distance from target shape to gray rectangle at (0, 2): 2
Distance from target shape to orange right_triangle at (0, 3): 3
Distance from target shape to cyan rectangle at (1, 3): 4
Closest shape is the gray rectangle at (0, 2) with distance 2</think>

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