#include <bits/stdc++.h>
using namespace std;

int main(){
  int n;
  cin>>n;
  string s[n],t[n];
  for(int i=0;i<n;i++){
    cin>>s[i];
  }
  for(int i=0;i<n;i++){
    cin>>t[i];
    if(s[i] != t[i]){
      cout<<i+1<<endl;
      cout<<s[i]<<endl;
      cout<<t[i]<<endl;
      return 0;
    }
  }
  return 0;
}