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 DIceRoll {
    static Scanner sc = new Scanner(System.in);

    public static void main(String[] args) {
        int Y = sc.nextInt(), W = sc.nextInt();
        int YW = Math.max(Y, W);
        int D = 6 - YW + 1, six = 6;
        if (D == 0) {
            System.out.println("0/1");
        } else {
            if (D % 2 == 0 && six % 2 == 0) {
                D /= 2;
                six /= 2;
            }
            if (D % 3 == 0 && six % 3 == 0) {
                D /= 3;
                six /= 3;
            }
            System.out.println(D + "/" + six);
        }
    }
}
