#include <bits/stdc++.h>
#define FOR(i,bg,ed) for(ll i=(bg);i<(ed);i++)
#define REP(i,n) FOR(i,0,n)
#define MOD 1000000007
//#define int long long
using namespace std;
typedef long long ll;
typedef vector<vector<ll>> mat;
const int INF = 1e9;



signed main()
{
    int N;
    string S[15], T[15];

    cin >> N;
    REP(i,N) cin >> S[i];
    REP(i,N) cin >> T[i];

    REP(i,N) if (S[i] != T[i]) {
        cout << i + 1 << endl;
        cout << S[i] << endl;
        cout << T[i] << endl;
    }
}