#define _USE_MATH_DEFINES
#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define MT make_tuple
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
#define RT return
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;
using vll = vector<ll>;

int N;
vector<string> sushi[21];

void solve() {
    cin >> N;
    map<string, multiset<int> > S;

    rep(i, N) {
        int U;
        cin >> U;
        if (U == 0) {
            int n, m;
            cin >> n >> m;
            rep(j, m) {
                string t;
                cin >> t;
                sushi[n].push_back(t);
                S[t].insert(n);
            }
        } else if (U == 1) {
            int ans = -1;
            string t;
            cin >> t;
            if (sz(S[t])) {
                auto it = S[t].begin();
                ans = *it;
                S[t].erase(it);
            }
            cout << ans << endl;
        } else {
            int n;
            cin >> n;
            each(t, sushi[n]) {
                if (S[t].count(n)) {
                    S[t].erase(n);
                }
            }
            sushi[n].clear();
        }
    }
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout << fixed << setprecision(15);
	solve();
	return 0;
}