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++: #include <iostream>

using namespace std;

int main()
{
  int n;
  cin >>n;

  while(n){	

	int m[200][100];
	int hoge[100];
	for(int asuka=0;asuka<200;asuka++){
	  for(int piyo=0;piyo<100;piyo++){
		m[asuka][piyo]=0;
	  }
	}
	int k[200];
	for(int piyo=0;piyo<200;piyo++){
	  k[piyo]=0;
	}
	//initialize

	
	for (int i = 0; i < n; i++) {
	  cin >> hoge[i];
	  for (int j = 0; j < hoge[i]; j++) {
		cin >> m[i][j];
	  }
	}
	int fuga=0;
	cin >> fuga;

	for (int l = 0; l < fuga; l++) {
	  cin >> k[l];
	}
	//end of input

	if(fuga ==0) cout << -1 << endl;

	else{	
	  int a,b,c;
	  int ans[200];
	  int aa=0;
	  ans[0]=0;
	
	  for(a=0;a<n;a++){
		b=0;
		//		cout << "a="<<a <<endl; 
		for(c=0;c<hoge[a];c++){
		  //		  cout << "c="<<c << endl;
		  if(k[b]==m[a][c]){
			b++;
		  }
		}
		
		if(b>=fuga){
		  ans[aa] = a;
		  aa++;
		  //		  cout << a << endl;//
		
		}
	  }
	  if(aa==1) cout << ans[0]+1 << endl;
	  else cout << -1 << endl;
	}
	
	cin >> n;
  }
  return 0;
}

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

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

vector< vector<int> > vec;
vector<int> vect;
int main(int argc, const char * argv[]) {
    //freopen("/Users/shitian/Downloads/in.txt", "r", stdin);
    int n, in, m, k;
    while(cin>>n){
        if(n==0)break;
        vec.clear();
        vect.clear();
        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;
                //                cout<<"out: "<<out<<endl;
                //                      cout << "=======" << i << endl;
                //                      cout<<out<<endl;
                //                      for(int j=0; j<vec[i].size(); j++) cout << vec[i][j] << " ";
                //                      cout << endl;
                //                      for(int j=0; j<vect.size(); j++) cout << vect[j] << " ";
                //                      cout << endl;
                
            }
        }
        int fai= -1;
        if(suc==1){
            cout<< po <<endl;
        }
        else{
            cout << -1 <<endl;
        }
        
    }
    
    return 0;
}

C++: #include<bits/stdc++.h>
using namespace std;

#define int long long
#define pb push_back 
#define pf push_front 
#define mp make_pair
#define fr first
#define sc second
#define Rep(i, n) for ( int i = 0 ; i < (n); i++ )
#define All(v) v.begin(), v.end()

typedef pair<int, int> Pii; typedef pair<int, Pii> Pip;
const int INF = 1107110711071107;

signed main() {
  int N;  
  while ( cin >> N, N ) {
    int M, K;
    int l[101];
    bool used[101][101] = {{0}};

    Rep(i, N) {
      cin >> M;
      Rep(j, M) {
	int p;
	cin >> p;
	p--;
	used[i][p] = true;
      }
    }

    cin >> K;
    Rep(i, K) {
      cin >> l[i];
      l[i]--;
    }

    int ans = -2;
    bool flag = false;
    Rep(i, N) {
      int cnt = 0;
      Rep(j, K) {
	if ( used[i][l[j]] ) cnt++;
      }
      if ( cnt == K ) {
	if ( flag ) {
	  ans = -2;
	} else {
	  ans = i;
	  flag = true;
	}
      }
    }

    cout << ans+1 << endl;
  }
}