// Length of the months (non-leap years)

public class Switch {

  public static void main(String[] args) {
    sw(42); System.out.println("----");
    sw(4); System.out.println("----");
    sw(7); System.out.println("----");
    sw(12);
  }

  public static void sw(int n) {
    switch (n) {
    case 23: case 3:
      System.out.println("A");
      break;
    case 32: case -2: case 42:
      System.out.println("B");
    case 12: case 8:
      System.out.println("C");
      break;
    case 34:
      System.out.println("D");
    default:
      System.out.println("F");
    case 7:
      System.out.println("G");
    }
  }
}