There are 3 shapes on a 6x6 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 (0, 4)
Distance from target shape to blue right_triangle at (4, 2): 6
Distance from target shape to gray right_triangle at (1, 0): 5
Closest shape is the gray right_triangle at (1, 0) with distance 5</think>

<answer>(1, 0)</answer>