#define A i = 0; i < n; i++
#include <stdio.h>
#include <string.h>

int main(void)
{
	int n, i;
	char s[10][21], t[10][21];
	scanf("%d", &n);
	for (A) scanf("%s", s[i]);
	for (A) scanf("%s", t[i]);
	for (A) {
		if (strcmp(s[i], t[i])) {
			printf("%d\n%s\n%s", i + 1, s[i], t[i]);
			break;
		}
	}
	return 0;
}