#include <iostream>
#include <map>

using namespace std;

void solve()
{
	int N;
	while(cin >> N, N)
	{
		map<int, int> Map;
		int temp;
		for(int i = 0; i < N; ++i)
		{
			cin >> temp;
			++Map[temp];
		}
		bool ok = false;
		for(map<int, int>::iterator Ite = Map.begin(); Ite != Map.end(); ++Ite)
		{
			if(Ite->second > N / 2)
			{
				cout << Ite->first << endl;
				ok = true;
				break;
			}
		}
		if(!ok)
		{
			cout << "NO COLOR" << endl;
		}
	}
}

int main()
{
	solve();
	return(0);
}