There are 3 shapes on a 6x6 grid. Which shape is closest to the blue 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: blue trapezoid at (4, 0)
Distance from target shape to green trapezoid at (1, 2): 5
Distance from target shape to red trapezoid at (5, 5): 6
Closest shape is the green trapezoid at (1, 2) with distance 5</think>

<answer>(1, 2)</answer>