#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
  int N;
  cin>>N;
  vector<string> A(N),B(N);
  for(int i=0;i<N;i++) cin>>A[i];
  for(int j=0;j<N;j++) cin>>B[j];
  for(int i=0;i<N;i++){
    if(A[i] != B[i]){
      cout<<i+1<<endl;
      cout<<A[i]<<endl;
      cout<<B[i]<<endl;
      return 0;
    }
  }
}