private List<WhiteFeedback> giveWhiteFeedback(Piece[] input, List<Integer> tokenpieces) {
        if (input.length != solution.length) {
            return null;
        }
        List<WhiteFeedback> feedbacklist = new ArrayList<>();
        for (int i = 0; i < input.length; i++) {
            for (int j = 0; j < solution.length; j++) {
                if (i != j && input[i].equals(solution[j]) && !tokenpieces.contains(j)) {
                    feedbacklist.add(new WhiteFeedback(feedbackmodel));
                    tokenpieces.add(j);
                }
            }
        }
        return feedbacklist;
    }