public static void main(String[] args) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        FileReader fr = new FileReader(reader.readLine());
        char[] data = new char[1024];
        String content = "";
        int len = 0;
        while ((len = fr.read(data)) != -1){
            for (int i = 0; i < len; i++){
                if (data[i] == '\n' || data[i] == '\r'){
                    for (int j = i; j < len-1; j++){
                        data[j] = data[j+1];
                    }
                    len--;
                    i--;
                }
            }
            String s = new String(data, 0, len);
            content += s;
        }
        String tag = "span";
        int prev = 0;
        while (true){
            int index = content.indexOf("<"+ tag);
            if (index == -1) break;
            int count = 1;
            int pv = index + tag.length();
            while (true){
                int pre = content.indexOf("<" + tag, pv);
                int end = content.indexOf("</" + tag + ">", pv);
                if (pre != -1 && pre < end) {
                    count++;
                    pv = pre + tag.length();
                } else  {
                    count--;
                    pv = end + tag.length() + 3;
                }
                if (count == 0) break;
            }
            String print = content.substring(index, pv);
            System.out.println(print);
            prev = index + tag.length();
            content = content.substring(prev);
        }
        reader.close();
        fr.close();
    }