public class Promotion {
  public static void main(String[] args) {
    System.out.println(1 + 1);
    System.out.println("1" + 2);
    System.out.println("1" + 2 + 3);
    
    String s = "";
    s = s + 3;
    System.out.println(s);
    System.out.println(1/2.0);
    System.out.println(1/2);
    System.out.println('a'/97);
  }
}