class ex10{
	private String firstName, secondName;
	ex10(String f){firstName = f;}
	ex10(String f, String s){
		this(f);
		secondName = s;
	}
	void printName(){
		System.out.println( firstName + " " + secondName );
	}
	public static void main(String args[]){
		ex10 e1 = new ex10( new String("Lion") );
		ex10 e2 = new ex10( new String("Lion"), new String("Heart") );
		e1.printName();
		e2.printName();
	}
}