#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); ++i)
#define srep(i,s,t) for (int i = s; i < t; ++i)
#define drep(i,n) for(int i = (n)-1; i >= 0; --i)
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
#define yn {puts("Yes");}else{puts("No");}
#define MAX_N 200005

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

    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;
            cout << s[i] << endl;
            cout << t[i] << endl;
        }
    }
    
    return 0;
}