using System;
using System.Linq;

class Program
{
    public void Solve()
    {
        int[] kaseki = Console.ReadLine().Split('.').Select(s => int.Parse(s)).ToArray();
        int[] hikaku = Console.ReadLine().Split('.').Select(s => int.Parse(s)).ToArray();

        if (kaseki[0] < hikaku[0]
            || (kaseki[0] == hikaku[0] && kaseki[1] < hikaku[1])
            || (kaseki[0] == hikaku[0] && kaseki[1] == hikaku[1] && kaseki[2] < hikaku[2]))
        {
            Console.WriteLine("NO");
        }
        else
        {
            Console.WriteLine("YES");
        }
    }

    static void Main()
    {
        var solver = new Program();
        solver.Solve();
    }
}