using System;
using System.Text;
using System.Linq;

namespace ConsoleApp11
{
    class Program
    {
        static void Main(string[] args)
        {
            int count = 0;

            string A = Console.ReadLine();
            string B = Console.ReadLine();

            A.ToArray();
            B.ToArray();

            for(int i = 0; i < A.Length; i++)
            {
                for(int j = 0; j < B.Length; j++)
                {
                    if(A[i] == B[i])
                    {
                        count++;
                        break;
                    }
                }
            }

            if(A.Length - 1 == count)
            {
                Console.WriteLine("YES");
            }
            else
            {
                Console.WriteLine("NO");
            }
        }        
    }
}