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:
Blue Black Black Purple
Black Brown Brown Black
Black Brown Brown Black
Brown Black Black Yellow

Output:
Brown Black Black Brown
Black Brown Brown Black
Black Brown Brown Black
Brown Black Black Brown


Example 2
Input:
Purple Black Black Pink
Black Brown Brown Black
Black Brown Brown Black
Green Black Black Orange

Output:
Brown Black Black Brown
Black Brown Brown Black
Black Brown Brown Black
Brown Black Black Brown


Example 3
Input:
Green Black Black Blue
Black Purple Purple Black
Black Purple Purple Black
Gray Black Black Pink

Output:
Purple Black Black Purple
Black Purple Purple Black
Black Purple Purple Black
Purple Black Black Purple


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


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:

```
Red Black Black Red
Black Red Red Black
Black Red Red Black
Red Black Black Red
```
assistant