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 Scratch {

        public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);
            int y = sc.nextInt();
            int w = sc.nextInt();
            int greatest = y;
            if(greatest<w)
                greatest=w;

            int remain = 6-greatest+1;
            int a=remain;
            int b=6;
            if(remain == 1)
            {   b=6;
                a=1;
            }
            else if(remain == 2){
                a=1;
                b=3;
            }
            else if(remain == 3){
                a=1;
                b=2;
            }
            else if(remain == 4){
                a=2;
                b=3;
            }
            else if(remain == 6){
                a=1;
                b=1;
            }

            System.out.println(a+"/"+b);
        }

    }