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

/* package codechef; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;



/* Name of the class has to be "Main" only if the class is public. */
public class Main
 
 
{
    static Scanner in = new Scanner(System.in);
    
    public static void solve()
    {
       
       int n=in.nextInt(),m=in.nextInt();
       
       
      int max=n;
      
      if(m>max)
      max=m;
      
     max=6-max+1;
     
     if(max==3)
     {
         System.out.println("1/2");
     }
     else if(max==4)
     {
         System.out.println("2/3");
     }
     else if(max==6)
     {
         System.out.println("1/1");
     }
     else if(max==2)
     {
         System.out.println("1/3");
     }
     else
     {
         System.out.println(max+"/6");
     }
     
       
        
       
        
    }
    

    
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		
		int t=1;
		//in.nextLine();
		
		while(t>0)
		{
		    
		    solve();
		    t--;
		}
		
		
	
	//	System.out.println(x);
	}
}
