There are 4 shapes on a 7x7 grid. Which shape is closest to the green trapezoid 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 trapezoid at (6, 0)
Distance from target shape to yellow square at (6, 2): 2
Distance from target shape to pink rectangle at (4, 3): 5
Distance from target shape to red rectangle at (5, 3): 4
Closest shape is the yellow square at (6, 2) with distance 2</think>

<answer>(6, 2)</answer>