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 Red Red Red
Blue Red Red Red
Blue Red Red Red

Output:
Black Red Black Black
Black Red Black Black
Black Red Black Black


Example 2
Input:
Green Yellow Yellow Yellow
Green Yellow Yellow Yellow
Green Yellow Yellow Yellow

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


Example 3
Input:
Yellow Green Green Green
Yellow Green Green Green
Yellow Green Green Green

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


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


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 Blue Black Black
Black Blue Black Black
Black Blue Black Black
```
assistant