public void setCle(String s){
		cle = s.toLowerCase();
		for(int i=0 ; i<cle.length() ; i++)
			if(((int)cle.charAt(i) < 97 || (int)cle.charAt(i) > 122)
					|| (cle.indexOf(cle.charAt(i)) != cle.lastIndexOf(cle.charAt(i)))) cle = "";
		if(!s.equals("")){
			for(int i=0 ; i<cle.length() ; i++)
				referenceCle[i] = cle.charAt(i);

			int index = cle.length();
			for(int i=0 ; i<26 ; i++){
				if(!cle.contains(((char)(i+97))+"")){
					referenceCle[index] = (char) (i+97);
					index++;
				}
			}
		}
	}