#include <iostream>
using namespace std;
const int maxn = 105;
int idx[maxn];
bool check(int A, int B) {
    if(idx[A] == idx[B]) {
        return true;
    }
    return false;
}
void union_two_elements(int A, int B) {
    int tmp = idx[A];
    for(int i = 0; i < maxn; i++) {
        if(idx[i] == tmp) {
            idx[i] = idx[B];
        }
    }
}
int main() {
    for(int i = 0; i < maxn; i++) {
        idx[i] = i;
    }

    while(true) {
        string s;
        cin >> s;

        if(s == "union") {
            int a,b;
            cin >> a >> b;
            union_two_elements(a, b);
        }
        else if(s == "check") {
            int a, b;
            cin >> a >> b;
            if(check(a, b)) {
                cout << "YES" << endl;
            }
            else {
                cout << "NO" << endl;
            }
        }
    }


    return 0;
}