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:
Green Green Black Black
Green Green Black Black
Gray Gray Blue Blue
Gray Gray Blue Blue

Output:
Gray Gray Gray Gray
Gray Gray Gray Gray
Gray Gray Gray Gray
Gray Gray Gray Gray


Example 2
Input:
Purple Purple Black Black
Purple Purple Black Black
Gray Gray Red Red
Gray Gray Red Red

Output:
Gray Gray Gray Gray
Gray Gray Gray Gray
Gray Gray Gray Gray
Gray Gray Gray Gray


Example 3
Input:
Brown Brown Black Black
Brown Brown Black Black
Pink Pink Red Red
Pink Pink Red Red

Output:
Pink Pink Pink Pink
Pink Pink Pink Pink
Pink Pink Pink Pink
Pink Pink Pink Pink


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

```
Yellow Yellow Yellow Yellow
Yellow Yellow Yellow Yellow
Yellow Yellow Yellow Yellow
Yellow Yellow Yellow Yellow
```
assistant