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

Output:
Pink Pink Purple Brown
Orange Orange Brown Orange
Purple Purple Pink Pink
Yellow Yellow Yellow Gray


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

Output:
Yellow Yellow Pink Orange
Orange Orange Green Red
Pink Pink Red Gray
Green Green Blue Blue


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

Output:
Brown Brown Green Pink
Gray Gray Red Purple
Orange Orange Yellow Orange
Green Green Yellow Blue


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


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
Pink Pink Brown Pink
Gray Gray Pink Blue
Gray Gray Green Brown
```
assistant