public class Wyraz {

	String str;
	int x;

	public Wyraz(){
		this.str="";
		this.x=0;

	}

	public void dodajZnak(char letter){
		str+=letter;
		x++;
	}

	public String toString(){
		return str;
	}

	public int length(){
		return x;
	}

	public static void main(String[] args) {
		Wyraz wy= new Wyraz();
		wy.dodajZnak('a');
		System.out.println(wy.toString());
		System.out.println(wy.length());
		wy.dodajZnak('b');
		System.out.println(wy.toString());
		System.out.println(wy.length());
		// TODO Auto-generated method stub

	}

}