Main.java

import java.util.Scanner;

public final class Main {

   static final String SENTINEL = "end";
   static final Scanner STDIN = new Scanner(System.in, "US-ASCII");

   // No not use side effects in expressions!
   // Localize scope! Use final!
   public static void mainAAAA() {
      String token;
      while (!(token = STDIN.next()).equals(SENTINEL)) {
         System.out.println (token);
      }
   }  // end AAAA

   // Do not repeat yourself!
   // Localize scope! Use final!
   public static void mainBBBB() {
      String token = STDIN.next();
      while (!token.equals(SENTINEL)) {
         System.out.println(token);
         token = STDIN.next();
      }
   }  // end BBBB

   public static void mainCCCC() {
      while (true) {
         final String token = STDIN.next();
         if (token.equals(SENTINEL)) break;
         System.out.println (token);
      }
   }  // end CCCC

   public static void mainDDD() {
      for (;;) {
         final String token = STDIN.next();
         if (token.equals(SENTINEL)) break;
         System.out.println (token);
      }
   }  // end DDDD

   public static void main(final String[] args) {
      mainAAAA();
   }
}