#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)
#define FOR(i,b,e) for (int i=(int)(b); i<(int)(e); i++)
#define ALL(x) (x).begin(), (x).end()

const double PI = acos(-1);

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  int n;
  cin >> n;

  map<string, int> wants[20];
  REP (i, n) {
    int t;
    cin >> t;
    if (t == 0) {
      int n, m;
      cin >> n >> m;
      --n;
      REP (i, m) {
        string s;
        cin >> s;
        wants[n][s]++;
      }
    } else if (t == 1) {
      string s;
      cin >> s;

      int p = -1;
      REP (i, 20) {
        if (wants[i][s] > 0) {
          wants[i][s]--;
          p = i+1;
          break;
        }
      }
      cout << p << endl;
    } else {
      int n;
      cin >> n;
      --n;
      wants[n].clear();
    }
  }
  
  return 0;
}