There are 5 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 (4, 5)
Distance from target shape to blue right_triangle at (7, 1): 7
Distance from target shape to red right_triangle at (0, 0): 9
Distance from target shape to cyan right_triangle at (3, 4): 2
Distance from target shape to orange trapezoid at (0, 7): 6
Closest shape is the cyan right_triangle at (3, 4) with distance 2</think>

<answer>(3, 4)</answer>