#include<string>
using namespace std;
class date
{
public:
string colar;
bool mark;//置1表示遍历过了
date(string s);
void create(string s);
};
date::date(string s)
{
colar=s;
mark=0;
}
void date::create(string s)
{
colar=s;
mark=0;
}
date a[1000];
int main()
{
int couts,colarcount,n;
string box;
while(cin>>couts)
{
n=0;
if(couts==0)break;
for(int j=0;j<couts;j++)
{
string s;
cin>>s;
a[j].create(s);
}
for(int j=0;j<couts;j++)
{
if(a[j].mark==1)continue;
colarcount=1;
for(int i=j+1;i<couts;i++)
{
if(a[i].colar==a[j].colar){colarcount++;a[i].mark=1;}
}
if(n<colarcount){n=colarcount;box=a[j].colar;}
}
cout<<box<<'\n';
}
return 0;
}