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.*;
public class Main{
    static int __gcd(int a, int b)  
        {  
            if (b == 0)  
            return a;  
            return __gcd(b, a % b);  
      
        } 
    public static void main(String [] args){
        Scanner in = new Scanner(System.in);
        int Y = in.nextInt();
        int W = in.nextInt();
        
        
        int a[]={1,2,3,4,5,6};
        int first_probability = 0;
        int count = 0;
        if(Y > W){
            first_probability = Y;
            for(int i=0;i<6;i++){
                if(first_probability <= a[i]){
                    count++;
                }
            }
        }
        else{
            first_probability = W;
            for(int i=0;i<6;i++){
                if(first_probability <= a[i]){
                    count++;
                }
            }
        }
        double value = ((double) count) / 6;
 
        int d;  
        d = __gcd(count, 6);  
  
       int x = count / d;  
        int y = 6 / d;  
 
       
        if(value == 0){
            System.out.println("0/1");    
        }
        else if(value == 1){
             System.out.println("1/1"); 
        }
        else{
             System.out.println(x+"/"+y); 
        }
        
        
        
        
        
    }
}