#include <iostream>
#include <cstdio>
#include <map>

using namespace std;

const int N = 30;

int q;
map<string, int> mm[N];

int main() {
    // freopen("sushi.in", "r", stdin);
    // freopen("sushi.out", "w", stdout);

    scanf("%d", &q);
    while (q--) {
        int op;
        scanf("%d", &op);
        if (op == 0) {
            int n, m;
            scanf("%d%d", &n, &m);
            mm[n].clear();
            string s;
            while (m--) {
                cin >> s;
                ++mm[n][s];
            }
        } else if (op == 1) {
            string s;
            cin >> s;
            int ans = -1;
            for (int i = 1; i <= 20; ++i) {
                auto it = mm[i].find(s);
                if (it == mm[i].end()) continue;
                ans = i;
                if (--((*it).second) == 0) mm[i].erase(it);
                break;
            }
            printf("%d\n", ans);
        } else {
            int n;
            scanf("%d", &n);
            mm[n].clear();
        }
    }

    return 0;
}