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 {
    private static final Scanner scanner = new Scanner(System.in);
    public static void main(String[] args) {
        int y = scanner.nextInt();
        int w = scanner.nextInt();
        int k = 0;
        int c = 6;
        if (w > y) k = w;
        else if (y > w) k = y;
        else k = w;
        k = 7 - k;
       // k = k + 1;
        if (k == c) {
            System.out.println(1 + "/" + 1);
        } else if (k % 2 == 0) {
            c = c / 2;
            System.out.println(k / 2 + "/" + c);
        } else if (k % 3 == 0) {
            c = c / 2;
            System.out.println(k / 2 + "/" + c);
        } else{
            System.out.println(k + "/" + c);
        }
    }
}