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 Blue Gray
Black Black Gray Blue
Black Black Black Black
Black Black Black Black

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


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

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


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

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


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

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