//#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
//using namespace atcoder;
using ll = long long;
#define all(A) A.begin(),A.end()
using vll = vector<ll>;
#define rep(i, n) for (long long i = 0; i < (long long)(n); i++)
using Graph = vector<vector<ll>>;

int main() {
	 
	ll N;
	cin>>N;
	vector<string> S(N),T(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<<S[i]<<endl<<T[i]<<endl;
		}
	}

}