// yukicoder: No.547 未知の言語
// 2019.4.18 bal4u

#include <stdio.h>
#include <ctype.h>
#include <string.h>

#define gc() getchar()
int in()
{
	int n = 0, c = gc();
	do n = 10 * n + (c & 0xf), c = gc(); while (c >= '0');
	return n;
}

int ins(char *s)
{
	char *p = s;
	do *s = gc();
	while (*s++ > ' ');
	*--s = 0;
	return s - p;
}

char s[12][25]; len[12];
char t[25];

int main()
{
	int i, w, N;
	
	N = in(); for (i = 0; i < N; i++) len[i] = ins(s[i]);
	for (i = 0; i < N; i++) {
		w = ins(t);
		if (w != len[i] || memcmp(t, s[i], w)) {
			printf("%d\n%s\n%s\n", i+1, s[i], t);
			break;
		}
	}
	return 0;
}