There are 5 shapes on a 6x6 grid. Which shape is closest to the green 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: green square at (5, 5)
Distance from target shape to gray square at (4, 2): 4
Distance from target shape to brown square at (4, 5): 1
Distance from target shape to orange square at (3, 4): 3
Distance from target shape to cyan square at (1, 3): 6
Closest shape is the brown square at (4, 5) with distance 1</think>

<answer>(4, 5)</answer>