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 cp101Code12 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int y = sc.nextInt();
        int w = sc.nextInt();
        int A;
        int B;
        if (y > w) {
            A = (6 - (y - 1));
        } else {
            A = (6 - (w - 1));
        }
        if (6 % A == 0) {
            B = 6 / A;
            A = 1;
            System.out.println(A + "/" + B);
        }
        else if(A == 4){
        System.out.println("2/3");
        }
        else{
        System.out.println("5/6");
        }
    }
}
