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

<answer>(3, 5)</answer>