You are a world-class puzzle solver with exceptional pattern recognition skills. Your task is to analyze puzzles, spot patterns, and provide direct solutions.
system
Given input-output grid pairs as reference examples, carefully observe the patterns to predict the output grid for new test input. Each pair follows the same transformation rule. Grids are 2D arrays represented as strings, with cells (colors) separated by spaces and rows by newlines.
Here are the input and output grids for the reference examples:
Example 1
Input:
Gray Blue Gray Blue
Blue Gray Blue Gray
Gray Blue Gray Blue
Blue Gray Blue Gray

Output:
Blue Gray Blue Gray
Gray Blue Gray Blue
Blue Gray Blue Gray
Gray Blue Gray Blue


Example 2
Input:
Gray Red Gray Red
Red Gray Red Gray
Gray Red Gray Red
Red Gray Red Gray

Output:
Red Gray Red Gray
Gray Red Gray Red
Red Gray Red Gray
Gray Red Gray Red


Example 3
Input:
Pink Red Pink Red
Red Pink Red Pink
Pink Red Pink Red
Red Pink Red Pink

Output:
Red Pink Red Pink
Pink Red Pink Red
Red Pink Red Pink
Pink Red Pink Red


Here is the input grid for the test example:
Input:
Yellow Green Yellow Green
Green Yellow Green Yellow
Yellow Green Yellow Green
Green Yellow Green Yellow


Directly provide the output grids corresponding to the given test input grids, based on the patterns observed in the reference examples.
user
The output grid for the test input grid is:

```
Green Yellow Green Yellow
Yellow Green Yellow Green
Green Yellow Green Yellow
Yellow Green Yellow Green
```
assistant