public static String stringProcessor(final String input){
        final StringBuilder builder = new StringBuilder();
        for(final char c : input.toCharArray()) {
            if(Character.isLetterOrDigit(c)) {
                builder.append(Character.isLowerCase(c) ? c : Character.toLowerCase(c));
            }
            else if(c == '\'') {
            	builder.append(c);
            }
        }
        return builder.toString();
    }