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:
Blue Blue Red Red
Blue Blue Red Red
Gray Gray Green Green
Gray Gray Green Green

Output:
Blue Blue Gray Gray
Blue Blue Gray Gray
Red Red Green Green
Red Red Green Green


Example 2
Input:
Red Red Blue Blue
Red Red Blue Blue
Gray Gray Purple Purple
Gray Gray Purple Purple

Output:
Red Red Gray Gray
Red Red Gray Gray
Blue Blue Purple Purple
Blue Blue Purple Purple


Example 3
Input:
Red Red Purple Purple
Red Red Purple Purple
Pink Pink Brown Brown
Pink Pink Brown Brown

Output:
Red Red Pink Pink
Red Red Pink Pink
Purple Purple Brown Brown
Purple Purple Brown Brown


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


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 Green Yellow Yellow
Green Green Yellow Yellow
Red Red Blue Blue
Red Red Blue Blue
```
assistant