There are 6 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 (1, 0)
Distance from target shape to pink right_triangle at (5, 1): 5
Distance from target shape to orange right_triangle at (6, 0): 5
Distance from target shape to red square at (5, 4): 8
Distance from target shape to purple trapezoid at (2, 6): 7
Distance from target shape to yellow square at (0, 0): 1
Closest shape is the yellow square at (0, 0) with distance 1</think>

<answer>(0, 0)</answer>