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;

import static java.lang.System.exit;

public class Main {

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

        int s1 = scan.nextInt();
        int s2 = scan.nextInt();

        double sum=0;
        if (s1 == 1 && s2 == 1) {
            System.out.println("1/1");
            exit(0);
        } else if (s1 == 0 && s2 == 0) {
            System.out.println("0/1");
            exit(1);
        }
        if (s1 > s2) {
            sum = ((6 - s1))+ 1;
        }
        else {
            sum = (6 - s2 + 1) / 6;
        }
            System.out.println(sum/6);

    }
}

