public static String superReducedString(String s) {
        Stack<Character> stack = new Stack<>();
        
        for (char c : s.toCharArray()) {
            if (!stack.isEmpty() && stack.peek() == c) {
                stack.pop();
            } else {
                stack.push(c);
            }
        }
        
        StringBuilder sb = new StringBuilder();
        for (char c : stack) {
            sb.append(c);
        }
        
        return sb.length() == 0 ? "Empty String" : sb.toString();
    }