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;
class c
{
  static void Main()
  {
    string[]s=Console.ReadLine().Split(' ');
    int x=int.Parse(s[0]);
    int y=int.Parse(s[1]);
    string ans="No";
    if(x==2&&y==2)ans="Yes";
    else if(y==2||x==2)ans="No";
    else if(x<8&&y<8&&x%2==y%2)ans="Yes";
    else if(x>=8&&y<8&&x%2!=y%2)ans="Yes";
    else if(x<8&&y>=8&&x%2!=y%2)ans="Yes";
    else if(x>=8&&y>=8&&x%2==y%2)ans="Yes";
    Console.WriteLine(ans);
  }
}