public List<String> subdomainVisits(String[] cpdomains) {
        Map<String, Integer> map = new HashMap<>(); String website, websites[]; int number; StringBuilder sb;
        for(String s: cpdomains){
            sb=new StringBuilder(); number=Integer.parseInt(s.split(" ")[0]);
            websites=s.split(" ")[1].split("\\.");
            for(int i=websites.length-1; i>0; i--){
                sb.insert(0, websites[i]);
                map.put(sb.toString(), map.getOrDefault(sb.toString(), 0) +number);
                sb.insert(0, ".");
            } sb.insert(0, websites[0]);
            map.put(sb.toString(), map.getOrDefault(sb.toString(), 0) +number);
        } List<String> list = new ArrayList<>();
        for(Map.Entry<String, Integer> entry: map.entrySet()){
            sb=new StringBuilder();
            sb.append(entry.getValue()).append(" ").append(entry.getKey());
            list.add(sb.toString());
        } return list;}