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:
Purple
Orange
Pink
Yellow
Pink
Brown
Purple
Gray

Output:
Black
Purple
Orange
Pink
Yellow
Pink
Brown
Purple


Example 2
Input:
Pink
Orange
Yellow
Blue
Red
Green
Pink

Output:
Black
Pink
Orange
Yellow
Blue
Red
Green


Example 3
Input:
Orange
Gray
Brown
Yellow
Yellow
Red
Green

Output:
Black
Orange
Gray
Brown
Yellow
Yellow
Red


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


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
Pink
Gray
Green
Pink
Brown
Gray
Brown
```
assistant