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: Wrong Answer)

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;

public class Program
{
    public static void Main() {
        Reader reader = new Reader(Console.In);
        int x = reader.RInt();
        int y = reader.Int();

        var g1 = new List<int> { 1, 3, 5, 7, 8, 10, 12 };
        var g2 = new List<int> { 4, 6, 9, 11 };

        if(g1.Any(a => a == x) && g1.Any(a => a == y)) {
            Console.WriteLine("YES");
        }else if(g2.Any(a => a == x) && g2.Any(a => a == y)) {
            Console.WriteLine("YES");
        }else {
            Console.WriteLine("NO");
        }
    }
}

public class Reader
{
    private readonly TextReader reader;
    private readonly char separator = ' ';
    private string[] A = new string[0];
    private int i;

    public Reader(TextReader r) { reader = r; }

    public string String() { return Set(); }
    public int Int() { return int.Parse(Set()); }
    public long Long() { return long.Parse(Set()); }

    public string RString() { return RSet(); }
    public int RInt() { return int.Parse(RSet()); }
    public long RLong() { return long.Parse(RSet()); }


    public int[] IntArray() { return A.Select(x => int.Parse(x)).ToArray(); }

    private void Read() {
        string line = reader.ReadLine();

        A = line.Split(separator);
        i = 0;
    }

    private string Set() { return A[i++]; }
    private string RSet() { Read(); return A[i++]; }
}