There are 4 shapes on a 4x4 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 (3, 0)
Distance from target shape to yellow square at (2, 0): 1
Distance from target shape to green right_triangle at (2, 1): 2
Distance from target shape to gray square at (0, 3): 6
Closest shape is the yellow square at (2, 0) with distance 1</think>

<answer>(2, 0)</answer>