#! /usr/bin/env ruby
# coding: utf-8
Thread.new do
  while n = gets.to_i
    break if n == 0
    v = gets.split.map{|e| e.to_i }
    raise "assert" unless v.length == n
    count = {}
    count.default = 0
    v.each do |e|
      count[e] += 1
    end
    ans = "NO COLOR"
    count.each do |k, v|
      ans = k if v > n / 2
    end
    puts ans
  end
end

sleep 10
    