There are 3 shapes on a 6x6 grid. Which shape is closest to the cyan 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: cyan square at (4, 0)
Distance from target shape to purple square at (3, 2): 3
Distance from target shape to brown rectangle at (1, 0): 3
Closest shape is the purple square at (3, 2) with distance 3</think>

<answer>(3, 2)</answer>