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;

/**
 *
 * @author Hamza
 */
public class DieRoll {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Scanner scan=new Scanner(System.in);
        int a=scan.nextInt();
        int max=a;
        int b=scan.nextInt();
        if(b>max)
            b=max;
        else if(a==1&&b==1)
            System.out.println("1/1");
        System.out.println(1+"/"+6/((6-max)+1));
        
    }
    
}