#include<bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(int)(n);i++)
using namespace std;

int main(){
    int n;
    string s[10],t[10];
    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;
        }
    }
}