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 int getMax(int a, int b) {
        if (a > b) {
            return a;
        } else {
            return b;
        }
    }

    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);
        int a = in.nextInt();
        int b = in.nextInt();

        int max = getMax(a, b);
        int k = 6;
        int n = k - getMax(a, b) + 1;
        if (n % 6 == 0) {
            n /= 6;
            k /= 6;
        } else if (n % 3 == 0) {
            n /= 3;
            k /= 3;
        } else if (n % 2 == 0) {
            n /= 2;
            k /= 2;
        }

        System.out.println(n + "/" + k);

    }

}
