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

#define DEBUG(x) cout<<#x<<": "<<x<<endl;
#define DEBUG_VEC(v) cout<<#v<<":";for(int i=0;i<v.size();i++) cout<<" "<<v[i]; cout<<endl

typedef long long ll;
#define vi vector<int>
#define vl vector<ll>
#define vii vector< vector<int> >
#define vll vector< vector<ll> >
#define vs vector<string>
#define pii pair<int,int>
#define pis pair<int,string>
#define psi pair<string,int>
const int inf=1000000001;
const ll INF=1e16;
#define MOD 1000000007
#define mod 1000000009
#define pi 3.14159265358979323846
#define Sp(p) cout<<setprecision(15)<<fixed<<p<<endl;
int dx[4]={1,0,-1,0}, dy[4]={0,1,0,-1};


int main(){
	int n,i,j;
	cin>>n;
	vs a(n),b(n);
	for(i=0;i<n;i++){
		cin>>a[i];
	}
	for(i=0;i<n;i++){
		cin>>b[i];
	}
	for(i=0;i<n;i++){
		if(a[i]!=b[i]){
			break;
		}
	}
	cout<<i+1<<endl<<a[i]<<endl<<b[i]<<endl;
}