@Override
	public LinkedList<String> getIcebergs() {
		
		LinkedList<String> l = new LinkedList<String>();
		
		for (MyString s : sample.keySet())
			if ((1 - lowerBoundFrequency / 2.) * frequency * sumK <= sample.get(s))
				l.add(s.str);
		
		return l;
	}