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 Main {

    public static void main(String[] args) {
        // write your code here

        Scanner scan = new Scanner(System.in);

        int a0 = scan.nextInt();
        int b0 = scan.nextInt();

        int a = Math.min(a0, b0);
        int b = Math.max(a0, b0);

        if (a == b) {
            System.out.print("1/1");

        } else {
            int d = getGCD(6 - b + 1, 6);

            System.out.print(6 - b + 1 / d + "/" + 6 / d);


        }


        scan.close();
    }

    public static int getGCD(int n1, int n2) {
        if (n2 == 0) {
            return n1;
        }
        return getGCD(n2, n1 % n2);

    }

}

