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.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class DieRoll {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        String s = br.readLine();
        String st[]=s.trim().split("\\s+");
        int a=Integer.parseInt(st[0]);
        int b=Integer.parseInt(st[1]);
        int max=a>b?a:b;
//        System.out.println(max);
        int count=0;
        for (int i=1;i<=6;i++){
            if(i>=max){
                count++;
            }
        }
//        System.out.println(count);
        if (count==0){
            System.out.println("0/1");
        }
        else if (count==6){
            System.out.println("1/1");
        }

        else {
            if (count%2==0){
                count=count/2;
                System.out.println(count+"/"+6/2);
            }
            else if (count%3==0){
                count=count/3;
                System.out.println(count+"/"+6/3);
            }
            else
            System.out.println(count+"/"+6);
        }
    }
}

