#include <stdio.h>
#include <string.h>
typedef struct{
	char ele[21];
}str;
str s[10],t[10];
int main(void){
	int n,i;
	scanf("%d",&n);
	for (i=0;i<n;i++){
		scanf("%s",s[i].ele);
	}
	for (i=0;i<n;i++){
		scanf("%s",t[i].ele);
	}
	for (i=0;i<n;i++){
		int boolean;
		boolean=strcmp(s[i].ele,t[i].ele);
		if (boolean){
			printf("%d\n",i+1);
			printf("%s\n",s[i].ele);
			printf("%s\n",t[i].ele);
		}
	}
	return 0;
}