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:
Yellow Yellow Purple Purple
Yellow Yellow Purple Purple
Orange Orange Pink Pink
Orange Orange Pink Pink

Output:
Orange Orange Red Red
Orange Orange Red Red
Pink Pink Purple Purple
Pink Pink Purple Purple


Example 2
Input:
Green Green Pink Pink
Green Green Pink Pink
Orange Orange Yellow Yellow
Orange Orange Yellow Yellow

Output:
Orange Orange Yellow Yellow
Orange Orange Yellow Yellow
Red Red Pink Pink
Red Red Pink Pink


Example 3
Input:
Green Green Orange Orange
Green Green Orange Orange
Gray Gray Brown Brown
Gray Gray Brown Brown

Output:
Gray Gray Yellow Yellow
Gray Gray Yellow Yellow
Brown Brown Orange Orange
Brown Brown Orange Orange


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

```
Pink Pink Gray Gray
Pink Pink Gray Gray
Gray Gray Gray Gray
Gray Gray Gray Gray
```
assistant