Problem:
Score : 100 points

Problem Statement

Based on some criterion, Snuke divided the integers from 1 through 12 into three groups as shown in the figure below.
Given two integers x and y (1 ≤ x < y ≤ 12), determine whether they belong to the same group.

Constraints

x and y are integers.

1 ≤ x < y ≤ 12

Input

Input is given from Standard Input in the following format:

x y

Output

If x and y belong to the same group, print Yes; otherwise, print No.

Sample Input 1

1 3

Sample Output 1

Yes

Sample Input 2

2 4

Sample Output 2

No

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace abc62
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] str = Console.ReadLine().Split(' ');
            int x = int.Parse(str[0]);
            int y = int.Parse(str[1]);
            x = group(x);
            y = group(y);
            if (x == y)
            {
                Console.WriteLine("Yes");
            }else
            {
                Console.WriteLine("No");
            }
        }

        static public int group(int x)
        {
            int ans = 0;
            if (x == 4 || x == 6 || x == 9 || x == 11)
            {
                ans = 1;
            }else if (x == 2)
            {
                ans = 2;
            }
            return ans;
        }
    }
}