private boolean deleteMatchingValues(NakedCandidates comparator, NakedCandidates operator) {
		
		boolean del = false;
		for (int i=0; i < comparator.values.size(); i++) {
			int j=0;
			while (j < operator.values.size()) {
				
				if (comparator.values.get(i).equals(operator.values.get(j))) {
					operator.values.remove(j);
					del = true;
				}
				else {j++;}
			}
		}
		
		return del;
	}