using System.Numerics;

public class Program
{
    public static void Main()
    {

        //BigInteger num = BigInteger.Parse(Console.ReadLine() ?? string.Empty);
        //int num = int.Parse(Console.ReadLine() ?? string.Empty);
        string[] moji = (Console.ReadLine() ?? string.Empty).Trim().Split(' ');
        //string moji = Console.ReadLine() ?? string.Empty;

        
        int a = int.Parse(moji[0]);
        int b = int.Parse(moji[1]);

        if(a <= -7||a >= 7 || b >= 7 || b <= -7)
        {
            Console.WriteLine("NO");
        }
        else if(a==5&&b==5||a==-6&&b==0||a==-1&&b==-5||a==5&&b==-3||a==2&&b==-2)
        {
            Console.WriteLine("NO");
        }
        else
        {
            Console.WriteLine("YES");
        }

    }
}