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.*;
import java.io.*;
public class MyClass {
    public static void main(String args[]) {
        try{
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            String s[] = br.readLine().split(" ");
            int n = Integer.parseInt(s[0]);
            int m = Integer.parseInt(s[1]);
            int max = Math.max(n,m);
            int num = 6-max+1;
            if(6%num == 0){
                int val = 6/num;
                System.out.println(1+"/"+val);
            }else{
                System.out.println(max+"/"+6);
            }
            
        }catch(Exception e){
            System.out.println("Error");
        }
    }
}