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

Output:
Brown Black Yellow
Black Black Black
Blue Black Purple


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

Output:
Green Black Orange
Black Black Black
Purple Black Pink


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

Output:
Gray Black Pink
Black Black Black
Green Black Blue


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


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 Brown
Black Black Black
Gray Black Purple
```
assistant