There are 3 shapes on a 7x7 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 orange trapezoid at (2, 1): 2
Distance from target shape to cyan square at (1, 5): 3
Closest shape is the orange trapezoid at (2, 1) with distance 2</think>

<answer>(2, 1)</answer>