Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

func main() {
	io := NewIo()
	defer io.Flush()

	for {
		N := io.NextInt()
		if N == 0 {
			break
		}
		set := make([]map[int]struct{}, N)
		for i := 0; i < N; i++ {
			set[i] = make(map[int]struct{})
			M := io.NextInt()
			for j := 0; j < M; j++ {
				p := io.NextInt()
				set[i][p] = struct{}{}
			}
		}
		K := io.NextInt()
		l := make([]int, K)
		for i := 0; i < K; i++ {
			l[i] = io.NextInt()
		}

		ans := 0
	FOR_OUTER:
		for i := 0; i < N; i++ {
			for j := 0; j < K; j++ {
				if _, f := set[i][l[j]]; f == false {
					continue FOR_OUTER
				}
			}
			switch ans {
			case 0:
				ans = i + 1
			default:
				ans = -1
			}
		}
		if ans > 0 {
			io.Println(ans)
		} else {
			io.Println(-1)
		}
	}
}

// I/O template
type Io struct {
	reader    *bufio.Reader
	writer    *bufio.Writer
	tokens    []string
	nextToken int
}

func NewIo() *Io {
	return &Io{
		reader: bufio.NewReader(os.Stdin),
		writer: bufio.NewWriter(os.Stdout),
	}
}

func (io *Io) Flush() {
	err := io.writer.Flush()
	if err != nil {
		panic(err)
	}
}

func (io *Io) NextLine() string {
	var buff []byte
	for {
		line, isPrefix, err := io.reader.ReadLine()
		if err != nil {
			panic(err)
		}
		buff = append(buff, line...)
		if !isPrefix {
			break
		}
	}
	return string(buff)
}

func (io *Io) Next() string {
	for io.nextToken >= len(io.tokens) {
		line := io.NextLine()
		io.tokens = strings.Fields(line)
		io.nextToken = 0
	}
	s := io.tokens[io.nextToken]
	io.nextToken++
	return s
}

func (io *Io) NextInt() int {
	i, err := strconv.Atoi(io.Next())
	if err != nil {
		panic(err)
	}
	return i
}

func (io *Io) NextFloat() float64 {
	i, err := strconv.ParseFloat(io.Next(), 64)
	if err != nil {
		panic(err)
	}
	return i
}

func (io *Io) Println(a ...interface{}) {
	fmt.Fprintln(io.writer, a...)
}

func (io *Io) Printf(format string, a ...interface{}) {
	fmt.Fprintf(io.writer, format, a...)
}

func (io *Io) PrintIntSlice(a []int) {
	b := []interface{}{}
	for _, x := range a {
		b = append(b, x)
	}
	io.Println(b...)
}

func (io *Io) PrintStringSlice(a []string) {
	b := []interface{}{}
	for _, x := range a {
		b = append(b, x)
	}
	io.Println(b...)
}

func Log(name string, value interface{}) {
	fmt.Fprintf(os.Stderr, "%s=%+v\n", name, value)
}

func ExampleIo() {
	io := NewIo()
	defer io.Flush()
	a := make([]int, 0, 3)
	a[0], a[1], a[2] = io.NextInt(), io.NextInt(), io.NextInt()
	io.Println(a)
	io.PrintIntSlice(a)
	Log("io", a)
}

C++: //
//  main.cpp
//  c
//
//  Created by 13B10694 on 2015/06/01.
//  Copyright (c) 2015????´ 13B10694. All rights reserved.
//

#include <iostream>
#include <vector>
#include<stdio.h>
#include <algorithm>
using namespace std;


int main(int argc, const char * argv[]) {
   freopen("/Users/shitian/Downloads/in.txt", "r", stdin);
    int n;
    while(cin>>n){
        vector< vector<int> > vec;
        vector<int> vect;
        int in, m, k;
        if(n==0)break;
        for(int i=0;i<n;i++){
            cin>>m;
            vector<int> tem;
            for(int j=0;j<m;j++){
                cin>>in;
                tem.push_back(in);
            }
            sort(tem.begin(),tem.end());
            vec.push_back(tem);
        }
        cin>>k;
        for(int i=0;i<k;i++){
            cin>>in;
            vect.push_back(in);
        }
        sort(vect.begin(),vect.end());
        int suc=0,po=-1;
        for(int i=0;i<vec.size();i++){
            
            if(vec[i].empty() && !vect.empty())continue;
            int now=0;
            int j;int out =0,count=0;
            for(j=0;j<vect.size();j++){
                
                while(vect[j]>vec[i][now]){
                    now++;
                    if(now >= (int)vec[i].size()){
                        out=1;
                        break;
                    }
                }
                
                if(vect[j]<vec[i][now]||out==1)
                    break;
                if(vect[j]==vec[i][now]){
                    now++;count++;
                }
            }
            // cout<<"out:  "<<out<<"     count:  "<<count<<endl;
            if(out==1){continue;}
            //cout<<"out:  "<<out<<"     count:  "<<count<<endl;
            
            // if(vect[vect.size()-1]==vec[i][now-1]&&count==(int)vect.size()){
            if((int)vect.size() == count) {
                suc++;
                po = i+1;
            }
        }
        int fai= -1;
        if(suc==1){
            printf("%d\n",po);
        }
        else{
            printf("%d\n",fai);
        }
        
    }
    
    return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;
bool know[100][100];
int main() {
    int N;
    while(scanf("%d",&N),N) {
        memset(know,0,sizeof(know));
        for(int i=0;i<N;i++) {
            int M;
            scanf("%d",&M);
            for(int j=0;j<M;j++) {
                int p;
                scanf("%d",&p);p--;
                know[i][p]=1;
            }
        }
        int K;
        scanf("%d",&K);
        vector<int> v;
        for(int i=0;i<K;i++) {
            int l;
            scanf("%d",&l);l--;
            v.push_back(l);
        }
        vector<int> m;
        for(int i=0;i<N;i++) {
            bool OK=1;
            for(int j=0;j<v.size();j++) {
                if(!know[i][v[j]]) {OK=0;break;}
            }
            if(OK) m.push_back(i);
        }
        if(m.size()==1) {
            printf("%d\n",m[0]+1);
        }else {
            printf("-1\n");
        }
    }
}

C++: #include <iostream>
#include <vector>

using namespace std;

typedef vector<int> vi;
typedef pair<int,int> pii;

#define dump(x)  cerr << #x << " = " << (x) << endl
#define rep(i,n) for(int i=0;i<(n);i++)
#define pb push_back
#define all(x) x.begin(),x.end()

bool solve(vi user,vi a){
    bool ret=true;
    rep(i,a.size()){
        if(find(all(user),a[i])==user.end())ret=false;
    }
    return ret;
}


int main(){
    int n;
    while(cin>>n){
        vi user[1000];
        vi loss;
        if(n==0)break;
        rep(i,n){
            int z;
            cin>>z;
            rep(j,z){
                int tmp;
                cin>>tmp;
                user[i].pb(tmp);
            }
            sort(all(user[i]));
        }
        int k;
        cin>>k;
        rep(i,k){
            int tmp;
            cin>>tmp;
            loss.pb(tmp);
        }
        int count=0;
        int ans=-1;
        rep(i,n){
            if(solve(user[i],loss)){
                count++;
                ans=i;
            }
        }
        if(count==1){
            cout<<ans+1<<endl;
        }
        else cout<<"-1"<<endl;
        
    }
    return 0;
}