#include <iostream>
#include <cstdio>
#include <algorithm>
#include <array>
#include <vector>
#include <map>

using namespace std;

int main() {
  while( true ) {
    int n;
    cin >> n;
    if ( n == 0 ) break;
    map<int, int> ms;
    for ( int i = 0; i < n; i++ ) {
      int val;
      cin >> val;
      ms[ val ] = ms[ val ] + 1;
    }
    bool exist = false;
    for ( auto elem : ms ) {
      if ( elem.second > n / 2 ) {
	exist = true;
	cout << elem.first << endl;
	break;
      }
    }
    if ( not exist ) {
      cout << "NO COLOR" << endl;
    }
  }
}