/**
 * This program checks to see that the user
 * entered the right number of arguments.
 *
 * After compiling, run with:
 * $ java SumSome6 2 3
 */
class SumSome6 {
  public static void main(String[] args) {
    if (args.length != 2) {
      System.out.println("You need to enter two numbers!");
      System.exit(1);
    }

    int x = Integer.valueOf(args[0]);
    int y = Integer.valueOf(args[1]);
    System.out.println(x + y);
  }
}