How to do regex

[wild vortex]

So I have a function where I get a string y as an argument. Then I am supposed to write a regex that matches patterns. As in if the arg is prog then I am gonna match words that contain the alphabets in prog. It is not regex I am finding hard since I could write it if I knew the string. But I don't even know how to begin or what to do with a varible. I would really appreciate the help!

[chilly panther]

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[stray oracle]

i dont entirely understand what your task is

[chilly panther]

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[blissful sparrow]

It really seems like a simple google request. However, here's what I found: https://www.w3schools.com/java/java_regex.asp

There is even an explanation of regex patterns and a short code snippet of how to use them in java:

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
  public static void main(String[] args) {
    Pattern pattern = Pattern.compile("w3schools", Pattern.CASE_INSENSITIVE);
    Matcher matcher = pattern.matcher("Visit W3Schools!");
    boolean matchFound = matcher.find();
    if(matchFound) {
      System.out.println("Match found");
    } else {
      System.out.println("Match not found");
    }
  }
}
// Outputs Match found

For other stuff I guess you can just read the javadocs of Pattern and Matcher classes

@wild vortex