There are 3 shapes on a 4x4 grid. Which shape is closest to the purple 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: purple trapezoid at (3, 3)
Distance from target shape to orange rectangle at (0, 3): 3
Distance from target shape to cyan square at (2, 0): 4
Closest shape is the orange rectangle at (0, 3) with distance 3</think>

<answer>(0, 3)</answer>