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

Output:
Green Gray Green Gray
Gray Green Gray Green
Green Gray Green Gray
Gray Green Gray Green


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

Output:
Purple Gray Purple Gray
Gray Purple Gray Purple
Purple Gray Purple Gray
Gray Purple Gray Purple


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

Output:
Brown Pink Brown Pink
Pink Brown Pink Brown
Brown Pink Brown Pink
Pink Brown Pink Brown


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


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:

```
Blue Yellow Blue Yellow
Yellow Blue Yellow Blue
Blue Yellow Blue Yellow
Yellow Blue Yellow Blue
```
assistant