#include <bits/stdc++.h>
#define rep(a,b,c) for(int a=(b);a<=(c);a++)
#define per(a,b,c) for(int a=(b);a>=(c);a--)
#define db long double
#define ll long long
using namespace std;

template<class T>inline void read(T &x) {
	T f=1; x=0; char s=getchar();
	while(s<'0'||s>'9'){if(s=='-')f=-1;s=getchar();}
	while(s>='0'&&s<='9'){x=x*10+s-'0';s=getchar();}
	x*=f;
}

int n,tag;
string s,ans;
map<string,int> cnt;

inline void solve() {
	read(n);
	rep(i,1,n) {
		cin>>s;
		cnt[s]++;
		if((cnt[s]*2)>=n) ans=s,tag=1;
	}
	if(tag) cout<<ans;
	else puts("uh-oh");
}

int main() {
	//int T; read(T); while(T--)
	solve();
}