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

using namespace std;

void add(string word1, string word2, map<string, pair<int, set<string> > >& s) {
    if (s.contains(word1)) {
        if (s[word1].second.count(word2) == 0)
            s[word1].first++;
    } else {
        pair<int, set<string> > tmp;
        tmp.first = 1;
        tmp.second.insert(word2);
        s.insert({word1, tmp});
    }
}

bool check(string word1, string word2, map<string, pair<int, set<string> > >& s) {
    return s[word1].second.contains(word2);
}

int main()
{
    map<string, pair<int, set<string> > > synonyms;
    int q = 0;
    cin >> q;
    for (int i = 0; i < q; ++i)
    {
        string operation;
        cin >> operation;
        if (operation == "ADD") {
            string word1, word2;
            cin >> word1 >> word2;
            add(word1, word2, synonyms);
            add(word2, word1, synonyms);
        }
        if (operation == "COUNT") {
            string word;
            cin >> word;
            cout << synonyms[word].first << endl;
        }
        if (operation == "CHECK") {
            string word1, word2;
            cin >> word1 >> word2;
            if (check(word1, word2, synonyms))
                cout << "YES\n";
            else
                cout << "NO\n";
        }
    }
}