public class Propagate2{
  static void a(){
    throw new RuntimeException("A");
  }
  static void b(){
    try { a(); }
    catch (RuntimeException e)
      {  System.out.println("b"); }
  }
  public static void main(String[] args){
    try{ b(); }
    catch (RuntimeException e){
      System.out.println("main");
    }
  }
}
//