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.Scanner;
public class MyClass {

    public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
     
    int a = scan.nextInt(); 
    int b = scan.nextInt();
    
    int max = a;
    
    if(b>a)
        max = b;
    
    a = 7 - max;
    b = 6;
    if(a%2 == 0 && b%2 == 0)
    {
        a = a/2;
        b = b/2;
    }
    if(a%3 == 0 && b%3 == 0)
    {
        a = a/3;
        b = b/3;
    }
        
    System.out.println(a+"/"+b);
     
    
    }
}