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 Brown Brown Purple
Blue Purple Brown Blue Purple
Blue Yellow Gray Yellow Purple
Blue Purple Brown Blue Purple
Blue Yellow Yellow Yellow Purple

Output:
Blue Brown Brown Brown Purple
Blue Black Brown Black Purple
Blue Yellow Gray Yellow Purple
Blue Black Brown Black Purple
Blue Yellow Yellow Yellow Purple


Example 2
Input:
Purple Green Green Green Pink
Purple Pink Green Purple Pink
Purple Orange Gray Orange Pink
Purple Pink Green Purple Pink
Purple Orange Orange Orange Pink

Output:
Purple Green Green Green Pink
Purple Black Green Black Pink
Purple Orange Gray Orange Pink
Purple Black Green Black Pink
Purple Orange Orange Orange Pink


Example 3
Input:
Green Gray Gray Gray Blue
Green Blue Gray Green Blue
Green Pink Yellow Pink Blue
Green Blue Gray Green Blue
Green Pink Pink Pink Blue

Output:
Green Gray Gray Gray Blue
Green Black Gray Black Blue
Green Pink Yellow Pink Blue
Green Black Gray Black Blue
Green Pink Pink Pink Blue


Here is the input grid for the test example:
Input:
Gray Red Red Red Purple
Gray Purple Red Gray Purple
Gray Brown Blue Brown Purple
Gray Purple Red Gray Purple
Gray Brown Brown Brown Purple


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 Red Red Red Purple
Gray Black Red Black Purple
Gray Brown Blue Brown Purple
Gray Black Red Black Purple
Gray Brown Brown Brown Purple
```
assistant