#include <vector>
#include <iostream>
#include <map>
#include <set>
#include <algorithm>
#include <string>

using namespace std;
void add(set<set<string>>& m, int& k){
    string str;
    int mycount;
    int flag = 0;
    set<string> s;
    for (int i = 0; i < 2; ++i){
        cin >> str;
        s.insert(str);
    }
    mycount = count(m.begin(), m.end(), s);
    if (mycount == 0){
        m.insert(s);
    }

}


void count(const vector<set<string>>& m){
    string str;
    int mycount = 0;
    int sum = 0;
    cin >> str;
    for(auto k : m){
        mycount = count(k.begin(), k.end(), str);
        sum += mycount;
    }

    cout << sum << endl;

}


void check(vector<set<string>>& m){
    string str;
    int flag = 0;
    int mycount;
    set<string> s;
    for (int i = 0; i < 2; ++i){
        cin >> str;
        s.insert(str);
    }
    mycount = count(m.begin(), m.end(), s);
    if (mycount == 0){
        cout << "NO" << endl;
    }
    else{
        cout << "YES" << endl;
    }
}





int main(){
    vector<set<string>> m;
    int Q;
    int k = 0;
    string str;
    cin >> Q;
    for(int i = 0; i < Q; ++i){
        cin >> str;
        if (str == "ADD"){
            add(m, k);

        }

        if (str == "COUNT"){
            count(m);

        }

        if (str == "CHECK"){
            check(m);
        }

    }

    return 0;


}