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 Codeforce01 {

    public static void main(String[] args) {
        
        Scanner input = new Scanner(System.in);
        
        int num1,num2;
        double p;
        num1=input.nextInt();
        num2=input.nextInt();
        if(num1>num2)
            p =(6-num1)/6.0;
        else 
            p = (6-num2)/6.0;
        
        if(p==0.0/6.0)
            System.out.println("1/6");
        else if(p==1.0/6.0)
            System.out.println("1/3");
        else if(p==2.0/6.0)
            System.out.println("1/2");
        else if(p==3.0/6.0)
            System.out.println("2/3");
        else if(p==4.0/6.0)
            System.out.println("5/3");
        else if(p==5.0/6.0)
            System.out.println("1/1");
        
    }
    
}