There are 3 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 (0, 0)
Distance from target shape to gray square at (0, 2): 2
Distance from target shape to cyan rectangle at (3, 0): 3
Closest shape is the gray square at (0, 2) with distance 2</think>

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