class Program
{
    static void Main(string[] args)
    {
        string inputTop = Console.ReadLine()!;
        string inputBottom = Console.ReadLine()!;
        List<int> oldList = new List<int>();
        List<int> myList = new List<int>();

        NumChangeFunc(inputTop, oldList);
        NumChangeFunc(inputBottom, myList);

        for (int i = 0; i <= oldList.Count; i++)
        {
            if (oldList[i] < myList[i])
            {
                Console.WriteLine("NO");
                return;
            }
        }
        Console.WriteLine("YES");
    }

    public static void NumChangeFunc(string input, List<int> versionList)
    {
        string version = "";
        foreach (char c in input)
        {
            if (c == '.')
            {
                versionList.Add(int.Parse(version));
            }
            else
            {
                version += c;
            }
        }
        versionList.Add(int.Parse(version));
    }
}