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 DivAProplems {

    public static void main(String[] arr) {
        dieRoll();
    }

    public static void dieRoll(){
// http://codeforces.com/contest/9/problem/A
        Scanner sc = new Scanner(System.in);
        int y = sc.nextInt();
        int w = sc.nextInt();

        if(y == w)
            System.out.print(1 + "/" + 1);
        else {
            int a = (w > y) ? w : y;

            int den = 6 - (a - 1);
            int denum = den;
            int enm = 6;
            int[] arr = {2, 3, 4, 5, 6};


            for (int i = 0; i < arr.length; i++) {
                if (den % arr[i] == 0 && 6 % arr[i] == 0) {
                    denum = den / arr[i];
                    enm = 6 / arr[i];
                    break;
                }
            }
            System.out.print(denum + "/" + enm);
        }



    }

}
