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 Gray Pink Pink
Gray Gray Pink Pink
Gray Gray Pink Pink
Gray Gray Pink Pink
Gray Gray Pink Pink

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


Example 2
Input:
Brown Brown Orange Orange
Brown Brown Orange Orange
Brown Brown Orange Orange
Brown Brown Orange Orange
Brown Brown Orange Orange

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


Example 3
Input:
Brown Brown Blue Blue
Brown Brown Blue Blue
Brown Brown Blue Blue

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


Here is the input grid for the test example:
Input:
Brown Brown Yellow Yellow
Brown Brown Yellow Yellow
Brown Brown Yellow Yellow
Brown Brown Yellow Yellow


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:

```
Black Yellow Yellow Brown
Black Yellow Yellow Brown
Black Yellow Yellow Brown
Black Yellow Yellow Brown
```
assistant