#include <bits/stdc++.h>
#define FOR(I,X,Y) for(int I=X;I<Y;I++)
#define INF 1e9+7
using namespace std;

string A[20][10];

int main(){
  int N,q,n,m,C;
  string B;
  cin >> N;
  vector<int> ans;
  FOR(bfruisbvf,0,N){
    cin >> q;
    if(q == 0){
      cin >> n >> m;
      FOR(i,0,m)cin >> A[n][i];
    }
    if(q == 1){
      cin >> B;
      int p = -1;
      FOR(i,0,20)FOR(j,0,10){
          if(B == A[i][j] && p == -1){
            p = i;
            A[i][j] = " ";
        }
      }
      ans.push_back(p);
    }
    if(q == 2){
      cin >> C;
      FOR(i,0,10)A[C][i] = " ";
    }
  }
  for(auto x:ans)cout << x << endl;
}