CCA anA = new CCA();
CCB aB = new CCB(1);
CCC aC = new CCC(2,3);
System.out.println("A = " + anA);
System.out.println("B = " + aB);
System.out.println("C = " + aC);
CCA aCast = aC;
System.out.println("aCast = " + aCast);
CCC anotherC = (CCC) aCast;
System.out.println("anotherC = " + anotherC);