#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define int long long
#define rep(i,n) for(int i=0;i<n;i++)
#define Rep(i,a,b) for(int i=a;i<b;i++)
#define REP(i,a,b) for(int i=a;i<=b;i++)
#define rev(i,n) for(int i=n-1;i>=0;i--)
#define vi vector<int>
#define vvi vector<vi>
#define pb push_back
#define pi pair<int,int>
#define vp vector<pair<int,int>>
#define mp make_pair
#define all(v) (v).begin(),(v).end()
#define fi first
#define se second
#define MEMSET(a) memset(a,0,sizeof(a))
#define inf (1ll<<60)
#define Yes(f) cout<<(f?"Yes":"No")<<endl
#define yes(f) cout<<(f?"yes":"no")<<endl
#define YES(f) cout<<(f?"YES":"NO")<<endl
#define SORT(v) sort(all(v))
#define RSORT(v) sort(all(v), greater<int>())
#define VI(a,n) vi a(n); rep(i,n)cin>>a[i];

using namespace std;

const int mod=1e9+7;

void run();

void init() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout<<fixed<<setprecision(12);
}

signed main(){
    init();
    run();
    return 0;
}

void run(){
    int n;
    cin>>n;
    vector<vector<string>> l(20);
    vi ans;
    while(n--){
        int d;
        cin>>d;
        if(d==0){
            int x,y;
            cin>>x>>y;
            x--;
            rep(i,y){
                string s;
                cin>>s;
                l[x].pb(s);
            }
        }
        else if(d==1){
            string s;
            cin>>s;
            rep(i,20){
                rep(j,l[i].size()){
                    if(s==l[i][j]){
                        cout<<(i+1)<<endl;
                        // ans.pb(i+1);
                        l[i].erase(l[i].begin()+j);
                        goto BR;
                    }
                }
            }
            cout<<-1<<endl;
            // ans.pb(-1);
            BR:;
        }
        else{
            int x;
            cin>>x;
            x--;
            l[x].clear();
        }
    }
    rep(i,ans.size()){
        cout<<ans[i]<<endl;
    }
}