//PROGRAM 4-9
class DemoSwitch2 {	
  public static void main(String[] args) {		
		
    String bulan = null;
    String triwulan = null;
    int noBulan = 3;
		
    switch(noBulan) {
      case 1: bulan = "Januari"; break;
      case 2: bulan = "Februari"; break;
      case 3: bulan = "Maret"; break;
      case 4: bulan = "April"; break;
      case 5: bulan = "Mei"; break;
      case 6: bulan = "Juni"; break;
      case 7: bulan = "Juli"; break;
      case 8: bulan = "Agustus"; break;
      case 9: bulan = "September"; break;
      case 10: bulan = "Oktober"; break;
      case 11: bulan = "November"; break;
      case 12: bulan = "Desember"; break;
      default: {
        System.out.println("Tidak ada bulan ke-" + noBulan);
        System.exit(1);
      }			
    }

    switch (noBulan) {
      case 1:
      case 2:
      case 3:
      case 4: {
        triwulan = "I";
        break;
      }
      case 5:
      case 6:
      case 7:
      case 8: {
        triwulan = "II";
        break;
      }
      case 9:
      case 10:
      case 11:
      case 12: {
        triwulan = "III";
        break;
      }	
      default: {
        System.out.println("Tidak ada bulan ke-" + noBulan);
        System.exit(1);
      }		    	
    }
		
    System.out.println("Bulan ke-" + noBulan + " (" + bulan + 
      ") masuk ke dalam triwulan " + triwulan);		
  }
}