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 Green Purple
Black Black Yellow Green
Black Black Black Black
Black Black Black Black

Output:
Green Purple Green Purple
Yellow Green Yellow Green
Green Purple Green Purple
Yellow Green Yellow Green


Example 2
Input:
Black Black Yellow Yellow
Black Black Yellow Purple
Black Black Black Black
Black Black Black Black

Output:
Yellow Yellow Yellow Yellow
Yellow Purple Yellow Purple
Yellow Yellow Yellow Yellow
Yellow Purple Yellow Purple


Example 3
Input:
Black Black Red Yellow
Black Black Red Yellow
Black Black Black Black
Black Black Black Black

Output:
Red Yellow Red Yellow
Red Yellow Red Yellow
Red Yellow Red Yellow
Red Yellow Red Yellow


Here is the input grid for the test example:
Input:
Black Black Purple Red
Black Black Purple Red
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:

```
Purple Red Purple Red
Purple Red Purple Red
Purple Red Purple Red
Purple Red Purple Red
```
assistant