There are 6 shapes on a 7x7 grid. Which shape is closest to the purple square 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 square at (0, 4)
Distance from target shape to blue square at (5, 5): 6
Distance from target shape to pink square at (5, 3): 6
Distance from target shape to cyan trapezoid at (2, 6): 4
Distance from target shape to red trapezoid at (2, 0): 6
Distance from target shape to green trapezoid at (4, 2): 6
Closest shape is the cyan trapezoid at (2, 6) with distance 4</think>

<answer>(2, 6)</answer>