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 problem9A {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int y = in.nextInt();
        int w = in.nextInt();
        in.close();
        y = Math.min(7 - y, 7 - w);
        String ans = "";
        if (y == 1)
            ans = "1/6";
        else
            if (y == 2)
                ans = "1/3";
            else
                if (y == 3)
                    ans = "1/2";
                else
                    if (y == 4)
                        ans = "2/3";
                    else
                        if (y == 5)
                            ans = "5/6";
                        else
                            ans = "1/1";
        System.out.println(ans);                
    }
}