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;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            String[] strArray = System.Console.ReadLine().Trim().Split(' ');
            int x = int.Parse(strArray[0]);
            int y = int.Parse(strArray[1]);
            int xGroup;
            int yGroup;
            xGroup = Grouping(x);
            yGroup = Grouping(y);
            if(xGroup == yGroup)
            {
                System.Console.WriteLine("Yes");
            }
            else
            {
                System.Console.WriteLine("No");
            }
        }
        static int Grouping(int a)
        {
            int[] group1 = new int[] { 1, 3, 5, 7, 8, 10, 12 };
            int[] group2 = new int[] { 4, 6, 9, 11 };
            if (Array.IndexOf(group1,a) >= 0)
            {
                return 1;
            }
            if (Array.IndexOf(group2, a) >= 0)
            {
                return 2;
            }
            return 3;
        }
    }
}