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

//package acm;

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
import java.util.HashMap;
import java.util.Scanner;

/**
 *
 * @author adMath.min
 */
import java.math.*;
public class Acm {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here

        Scanner sc = new Scanner(System.in);
    int x=sc.nextInt();
    int y=sc.nextInt();
 int c=0;
   int  s=Math.max(x, y);
     for(int i=1;i<=6;i++){
     if(i>=s)
         c++;
     
     }
   String d=c+"";
       BigInteger o=new BigInteger(d);

            System.out.println(o .divide(o.gcd(new BigInteger("6")))+"/"+(new BigInteger("6").divide(o.gcd(new BigInteger("6")))));

        
    
    
    
    }
}
