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.*;
public class Main{
    int gcd(int a,int b){
        return a%b == 0?b:gcd(b,a%b);
    }
    void doMain(){
        Scanner sc = new Scanner(System.in);
        int W,L;
        W = sc.nextInt();
        L = sc.nextInt();
        int ans = 7-Math.max(W,L);
        int six = 6/gcd(ans,6);
        System.out.println(ans/gcd(ans,6)+"/"+six);

    }
    public static void main(String args[]){
        Main s = new Main();
        s.doMain();
    }
}
