#include<bits/stdc++.h>
using namespace std;
int n,vmax;
string x,smax;
map<string,int> m;
map<string,int>::iterator p;

int main(){
    while(scanf("%d",&n) && n!=0){
        m.clear();
        vmax=0;
        while(n--){
            cin>>x;
            if(m.find(x)==m.end())m[x]=1;
            else m[x]++;
        }
        for(p=m.begin();p!=m.end();p++){
            if(p->second>vmax){
                vmax=p->second;
                smax=p->first;
            }
        }
        cout<<smax<<endl;
    }
    return 0;
}

hdu_1004 Let the Balloon Rise