HOJ ( acm.hdu.edu.cn ) 1004

#include<iostream>
#include<string>
#include<map>
using namespace std;
int main()
{
   int n;
   while(cin>>n&&n!=0)
   {

       //if(n==0)break;
       map<string,int> m;
       string x;
       for(int i=0;i<n;i++)
       {
           cin>>x;
           m[x]++;
       }
       int imost=0;
       string smost;
       for(map<string,int>::iterator i=m.begin();i!=m.end();++i)
       {
           if(i->second>imost)
           {
               imost=i->second;
               smost=i->first;
           }
       }
       cout<<smost<<endl;
   }
   return 0;
}