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 Brown Purple Pink
Orange Orange Brown Orange
Green Pink Pink Purple
Green Gray Yellow Yellow

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


Example 2
Input:
Blue Orange Pink Yellow
Purple Red Green Orange
Blue Gray Red Pink
Brown Blue Blue Green

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


Example 3
Input:
Blue Pink Green Brown
Pink Purple Red Gray
Gray Orange Yellow Orange
Orange Blue Yellow Green

Output:
Brown Brown Brown Brown
Brown Brown Brown Brown
Brown Brown Brown Brown
Brown Brown Brown Brown


Here is the input grid for the test example:
Input:
Blue Gray Gray Gray
Pink Pink Brown Pink
Gray Blue Pink Gray
Pink Brown Green Gray


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