#include<iostream>
#include<cstring>
using namespace std;
int main(){
	int n,m;
	int i,j,k;
	char a[2][30][30];
	cin>>n;
	for(i=0;i<2;i++){
		for(j=0;j<n;j++){
			cin>>a[i][j];
		}
	}
	for(i=0;i<n;i++){
		if(strcmp(a[0][i],a[1][i])){
			cout<<i+1<<endl;
			cout<<a[0][i]<<endl;
			cout<<a[1][i]<<endl;
		}
	}
	return 0;
}