//c
//https://github.com/WEIZIBIN/acm/blob/master/hdu1004.c
#include <stdio.h>
#include <string.h>
int main()
{
int i, n, j;
char s[1005][15];
int count[1005] = {0};
while(scanf("%d", &n) != EOF && n != 0)
{
int max = -1;
int maxIndex = -1;
memset(count,0,sizeof(count));
for (i = 0; i < n; ++i)
{
scanf("%s", s[i]);
}

	for (i = 0; i < n; ++i)
	{
		for (j = 0; j < n; ++j)
		{
			if(s[i][0] != ‘\0‘)
			{
				if (i != j)
				{
					if (s[j][0] != ‘\0‘)
					{
						if (strcmp(s[i], s[j]) == 0)
						{
							count[i]++;
							s[j][0] = ‘\0‘;
						}
					}
				}
			}
			else
				i++;
		}
	}
	for (i = 0; i < n; ++i)
	{
		if(count[i] > max)
		{
			max = count[i];
			maxIndex = i;
		}
	}
	printf("%s\n", s[maxIndex]);
}
return 0;

}

hdu1004