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 {
//Capital M again :)
    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        int x, y, m;
        double p;

        x = input.nextInt();
        y = input.nextInt();

        m = (6 - Math.max(x, y)) + 1;

        p = m / 6.0;

        if (p == 0) {

            System.out.println("0/1");
        } else if (p == 1 / 6.0) {

            System.out.println("1/6");
        } else if (p == 1 / 3.0) {

            System.out.println("1/3");
        } else if (p == 3 / 6.0) {

            System.out.println("1/2");
        } else if (p == 2 / 3.0) {

            System.out.println("2/3");
        } else if (p == 5 / 6.0) {

            System.out.println("5/6");
        } else if (p == 6 / 6.0) {

            System.out.println("1/1");
        }

    }

}
