class SwitchTest {
	
	static int tage(int monat, int jahr){
      int tage;
      switch(monat){
        case 2: if((jahr%4!=0)||(jahr%400==0))
                    tage=28;
                else tage=29;
                break;
        default: tage = 31; break;
        case 4:
        case 6:
        case 9:
        case 11: tage = 30; break;
        }
       return tage;
}

		
    public static void main(String args[]) {
        for (int i =1; i <= 12; i++)
          System.out.print(tage(i,2000)+" "); 	
        System.out.println("  Jahr 2000");         
        for (int i =1; i <= 12; i++)
          System.out.print(tage(i,2004)+" "); 	
        System.out.println("  Jahr 2004"); 
        for (int i =1; i <= 12; i++)
          System.out.print(tage(i,2006)+" "); 	
        System.out.println("  Jahr 2006");           
        }   
}