public String toString() {
    	String jono = "";
    	for (int i = 0; i < this.tunnetut.length; i++) {
    		if (this.tunnettut[i] = false)
    			jono[i] = jono[i] + "_";
    		else
    			jono[i] = jono[i] + this.merkit[i];
    	}
    	return jono;
    }
    
}