6 6
 1 4
 4 4
 3 3
 6 4
 6 3
 5 4
 5 6
 3 4
 1 3
 3 2
 5 5
 1 1
 2 1
 3 1
 3 5
 1 6
 6 5
 2 3
 4 3
 2 2
 3 6
 1 2
 6 1
 2 5
 4 5
 1 5
 6 2
 4 6
 5 1
 4 1
 5 2
 2 4
 2 6
 5 3

1/6
 1/2
 1/2
 2/3
 1/6
 1/6
 1/3
 1/6
 1/2
 2/3
 2/3
 1/3
 1/1
 5/6
 2/3
 1/3
 1/6
 1/6
 2/3
 1/2
 5/6
 1/6
 5/6
 1/6
 1/3
 1/3
 1/3
 1/6
 1/6
 1/3
 1/2
 1/3
 1/2
 1/6
 1/3

import java.util.Scanner;

public class Dcoder
 { 
 	public static void by(int a,int b)
 	{
 		for(int i=a;i!=0;i--)
          {
              if(b%i==0 && a%i==0)
              {
          	  System.out.println((a/i)+"/"+(b/i));
               break ;
              }
        	
          }
 	}
	public static void main(String args[])
 	{ 
 		Scanner input = new Scanner(System.in);
 		
 		int w =input.nextInt();
 		int y =input.nextInt();

        if(w>y)
        {
          by(7-w,6) ;
        }else{
          by(7-y,6) ;
        }
 	}
 }