#include <iostream>
#include <map>

using namespace std;

#define REP(i,a,b) for(int i=a;i<int(b);i++)
#define rep(i,n) REP(i,0,n)

int main() {
  
  int N; while(cin >> N&&N){
  map<int,int> cnt; rep(i, N) { int x; cin >> x; cnt[x] ++; }
  bool ans = 0;
  for(auto i: cnt) { if(i.second > N/2) { ans = 1; cout << i.first << endl; } }
  if(!ans) cout << "NO COLOR\n";}
  
  return 0;
}