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:
Black Black Yellow Purple
Black Black Brown Pink
Black Black Pink Black
Black Black Black Brown

Output:
Purple Yellow Black Black
Pink Brown Black Black
Black Pink Black Black
Brown Black Black Black


Example 2
Input:
Black Black Black Orange
Black Black Black Red
Black Black Brown Red
Black Black Black Black

Output:
Orange Black Black Black
Red Black Black Black
Red Brown Black Black
Black Black Black Black


Example 3
Input:
Black Black Black Black
Black Black Black Red
Black Black Pink Blue
Black Black Black Gray

Output:
Black Black Black Black
Red Black Black Black
Blue Pink Black Black
Gray Black Black Black


Here is the input grid for the test example:
Input:
Black Black Gray Black
Black Black Black Black
Black Black Blue Black
Black Black Gray 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 Gray Black Black
Black Black Black Black
Black Blue Black Black
Black Gray Black Black
```
assistant