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 Black Black
Black Yellow Yellow Black
Black Yellow Yellow Black
Black Black Black Black

Output:
Yellow Black Black Yellow
Black Yellow Yellow Black
Black Yellow Yellow Black
Yellow Black Black Yellow


Example 2
Input:
Black Black Black Black
Black Green Green Black
Black Green Green Black
Black Black Black Black

Output:
Green Black Black Green
Black Green Green Black
Black Green Green Black
Green Black Black Green


Example 3
Input:
Black Black Black Black
Black Gray Gray Black
Black Gray Gray Black
Black Black Black Black

Output:
Gray Black Black Gray
Black Gray Gray Black
Black Gray Gray Black
Gray Black Black Gray


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