There are 3 shapes on a 8x8 grid. Which shape is closest to the orange 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: orange trapezoid at (6, 0)
Distance from target shape to gray rectangle at (5, 6): 7
Distance from target shape to yellow right_triangle at (4, 0): 2
Closest shape is the yellow right_triangle at (4, 0) with distance 2</think>

<answer>(4, 0)</answer>