#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i, n) for(int i = 0; i < (n); i++)
#define rep1(i, n) for(int i = 1; i <= (n); i++)
#define co(x) cout << (x) << "\n"
#define cosp(x) cout << (x) << " "
#define ce(x) cerr << (x) << "\n"
#define cesp(x) cerr << (x) << " "
#define pb push_back
#define mp make_pair
#define Would
#define you
#define please

int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);


	int N;
	cin >> N;
	string S[10];
	rep(i, N) cin >> S[i];
	rep(i, N) {
		string T;
		cin >> T;
		if (S[i] != T) {
			co(i + 1);
			co(S[i]);
			co(T);
			return 0;
		}
	}


	Would you please return 0;
}