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

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