case 1:

	X = "ABC";

case 2:

	X = "ABC" + "XYZ";

case 3:

	X = 'A';

case 4:

	X = "ABC";

	Y = "XYZ";

	Z = X + Y;

case 5:

	X = 5 + "XYZ";

case 6:

	X = 5;

	Y = "XYZ";

	Z = X+Y;

case 7:

	X = 5;

	Y = 10;

	Z = X + Y;