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
Black Black Black Black Black
Black Black Black Black Black
Black Black Black Black Black
Black Black Black Black Black

Output:
Yellow Yellow Yellow Yellow Yellow
Yellow Yellow Yellow Yellow Yellow
Yellow Yellow Yellow Yellow Yellow
Yellow Yellow Yellow Yellow Yellow
Yellow Yellow Yellow Yellow Yellow


Example 2
Input:
Blue Green Green
Red Blue Red
Red Red Green

Output:
Gray Gray Gray
Gray Gray Gray
Gray Gray Gray


Example 3
Input:
Red Red Green
Red Green Green
Green Red Blue

Output:
Gray Gray Gray
Gray Gray Gray
Gray Gray Gray


Here is the input grid for the test example:
Input:
Red Blue Red Blue
Green Red Blue Green
Red Red Blue Green
Blue Blue Blue Green


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:

```
Gray Gray Gray Gray
Gray Gray Gray Gray
Gray Gray Gray Gray
Gray Gray Gray Gray
```
assistant