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;

namespace AtCoder
{
	class Program
	{
		static void Main(string[] args)
		{
			var Grup = new Grouping();
			Grup.Exec();
		}
	}

	public class Grouping
	{
		public void Exec()
		{
			var array = Console.ReadLine().Split(' ').Select(i => int.Parse(i)).ToArray();
			int x = array[0];
			int y = array[1];
			List<int> g1 = new List<int>() { 1, 3, 5, 7, 8, 10, 12 };
			List<int> g2 = new List<int>() { 4, 6, 9, 11 };
			List<int> g3 = new List<int>() { 2 };

			bool contains = false;
			if ((g1.Contains(x) && g1.Contains(y))
				|| (g2.Contains(x) && g2.Contains(y))) {
				contains = true;
			}

			Console.WriteLine(contains ? "Yes" : "No");

			Console.Out.Flush();

			Console.ReadLine();
		}
	}
}