import java.util.Scanner;
public class While1 {
   public static void main(String[]	args){
   
      System.out.println("begin");
   
      Scanner sc = new Scanner(System.in);
   
   
      String test = "y";
      while (test.substring(0,1).toLowerCase().equals("y")) {
      
         System.out.print("loop ");
      
         test = sc.next();
      
      
      }
   
      System.out.println("end");
   
   
   }
}