import java.util.regex.*; 
public class Test{
  public static void main(String[] args){
    String s = "ad8fas9d12342d2s";
     Pattern p=Pattern.compile("\\d+"); 
     Matcher m=p.matcher;
     String sb=new String();
     while(m.find()) {sb=sb+m.group();}
      System.out.print(sb);
    }
}