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:
Red Red Black Black Black
Red Red Black Black Black
Black Black Black Blue Blue
Black Black Black Blue Blue
Yellow Yellow Black Black Black
Yellow Yellow Black Black Black

Output:
Red
Black
Black
Black


Example 2
Input:
Green Green Black Black Black Black
Green Green Black Black Blue Blue
Black Black Black Black Blue Blue
Black Blue Blue Black Black Black
Black Blue Blue Black Black Black
Black Black Black Black Black Black
Yellow Yellow Black Yellow Yellow Black
Yellow Yellow Black Yellow Yellow Black
Black Black Black Black Black Black

Output:
Black
Green
Black
Black


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

Output:
Black
Green
Black
Black


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


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
Black
Black
Yellow
```
assistant