Filter.java [Last ned]

import java.util.*;
import static java.lang.System.*;
 
public class Filter {
 
  public static void main(String[] args) {
    String filter = args[0];
    Scanner stdin = new Scanner(in);
 
    String linje;
    while ( stdin.hasNextLine() ) {
      linje = stdin.nextLine();
      if ( linje.matches("(.)*" + filter + "(.)*") )
        out.println(linje);
    }
  }
 
}