There are 6 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 (5, 4)
Distance from target shape to blue trapezoid at (3, 2): 4
Distance from target shape to gray square at (3, 6): 4
Distance from target shape to yellow square at (2, 0): 7
Distance from target shape to cyan rectangle at (5, 0): 4
Distance from target shape to orange trapezoid at (4, 4): 1
Closest shape is the orange trapezoid at (4, 4) with distance 1</think>

<answer>(4, 4)</answer>