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;

import java.util.Scanner;

public class Acm {

    public static void main(String[] args) {

        Scanner s = new Scanner(System.in);
        double x = s.nextInt();
        double y = s.nextInt();
        
        x = Math.abs(x - 6);
        y = Math.abs(y-6);
        if(x/y  == 0) System.out.println("0/1");
        else if(x/y == 1)System.out.println("1/1");
        else System.out.println(x/y);
        
        
    }
}
