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 test{
    public static void main(String args[]){
        Scanner reader = new Scanner(System.in);
        
        
        int y = reader.nextInt();
        int w = reader.nextInt();

        //System.out.println(w+" "+y);

        int x = Math.max(w, y);
        int a = 7 - x;

        //System.out.println(a);

        int num = a;
        int den = 6;

        if(num == den){
            System.out.println("1/1");
        }else if(num == 1){
            System.out.println("1/6");
        }else if(num % 2 == 0){
            num /= 2;
            den /= 2;
            System.out.println(num+"/"+den);
        }else if(den % num == 0){
            den = den / num;
            num = 1;
            System.out.println(num+"/"+den);
        }else{
            System.out.println(num+"/"+den);
        }

        reader.close();
    }

    
}