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
Purple
Orange
Pink
Yellow
Pink
Brown
Purple

Output:
Yellow Yellow Black Black Black
Purple Purple Black Black Black


Example 2
Input:
Pink
Orange
Yellow
Blue
Red

Output:
Pink Black Black Black Black


Example 3
Input:
Orange
Gray
Brown
Yellow
Yellow

Output:
Orange Black Black Black
Gray Black Black Black


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

```
Gray Gray Gray Black
Pink Pink Black Black
Green Black Black Black
```
assistant