There are 4 shapes on a 8x8 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 (3, 4)
Distance from target shape to brown rectangle at (1, 3): 3
Distance from target shape to red right_triangle at (4, 7): 4
Distance from target shape to yellow rectangle at (4, 5): 2
Closest shape is the yellow rectangle at (4, 5) with distance 2</think>

<answer>(4, 5)</answer>