zoj 2104

#include<iostream>
#include<map>
using namespace std;
int main()
{
int s,m;
string c,most;

while((cin>>s)&&s!=0)
{
map<string,int> balloon;

for(int i=0;i<s;i++)
{
cin>>c;

++balloon[c];
}
map<string,int>::iterator iter=balloon.begin();
m=0;
for(;iter!=balloon.end();iter++)
{

if(m<(iter->second))
{
m=iter->second;
most=iter->first;
}

}
cout<<most<<endl;
}

return 0;
}