bool isShorter(const string &s1,const string &s2)

{

    return s1.size() < s2.size();

}

bool GT6(const string &s)

{

    return s.size() >= ;

}

int main()

{

    vector<string> words;

    string nect_word;

    while (cin >> next_word){

        words.push_back(next_word);

　　}

    sort (words.begin(), words.end());

    vector<string>::iterator end_unique = unique(words.begin(), words.end());

    words.erase(end_unique, words.end());

    stable_sort(words.begin(),word.end(),isShorter);

    vector<string>::size_type wc = count_if (words.begin(), words.end(), GT6);

    cout << wc << " " << make_plural (wc, "word", "s") << " 6 characters or longer " << endl;

    return ;

}