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 Session {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        int y = in.nextInt();

        int w = in.nextInt();

        int n = 6 - Math.max(w, y);
        int gc = gcd(n, 6);

        if (gc > 0 && n != gc) {
            System.out.println(n / gc + "/" + 6 / gc);
        } else {
            System.out.println(n + "/" + 6);
        }

    }

    public static int gcd(int a, int b) {
        if (b == 0) {
            return a;
        } else {
            return gcd(a, a % b);
        }
    }

}
