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 Black Gray Gray
Black Black Gray Black
Brown Purple Red Gray

Output:
Brown Brown Brown Brown
Purple Purple Purple Purple
Gray Red Gray Gray
Gray Gray Gray Gray


Example 2
Input:
Black Black Black Black
Gray Black Black Black
Purple Green Red Brown

Output:
Purple Purple Purple Purple
Green Green Green Green
Red Red Red Red
Gray Brown Brown Brown


Example 3
Input:
Gray Gray Gray Gray
Black Black Black Black
Blue Yellow Purple Red

Output:
Blue Blue Blue Blue
Yellow Yellow Yellow Yellow
Gray Gray Gray Gray
Red Red Red Red


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


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:

```
Gray Gray Gray Gray
Purple Purple Purple Purple
Gray Gray Yellow Yellow
Gray Gray Green Green
```
assistant