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

using namespace std;

set<map<string, string>> add(string word1, string word2, set<map<string, string>>& s) {
    s.insert({ word1, word2 });
    return s;
}

int count_synonyms(string word, const set<map<string, string>>& s) {
    int counts = 0;
    for (const auto& x1 : s)
        for (const auto& x2 : x1)
            if (word == x2.first || word == x2.second)
                ++counts;
    return counts;
}

bool check(string word1, string word2, const set<map<string, string>>& s) {
    for (const auto& x1 : s)
        for (const auto& x2 : x1)
            if ((word1 == x2.first && word2 == x2.second) || (word2 == x2.first && word1 == x2.second))
                return true;
            else
                return false;
}

int main()
{
    set<map<string, 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);
        }
        if (operation == "COUNT") {
            string word;
            cin >> word;
            cout << count_synonyms(word, synonyms);
        }
        if (operation == "CHECK") {
            string word1, word2;
            cin >> word1 >> word2;
            if (check(word1, word2, synonyms))
                cout << "YES";
            else
                cout << "NO";
        }
    }
}