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.*;
public class Main {

    public static void main(String[] args) {
	// write your code here
    int n,l;
        Scanner scanner=new Scanner(System.in);
        n=scanner.nextInt();
        l=scanner.nextInt();

        int max=Math.max(l,n);
        int prob=7-max;
        if(prob>6)prob=6;
        if (prob<=0) System.out.println("0/1");
        else if(6%prob==0&&prob!=0) System.out.println(prob/prob+"/"+6/prob);
        else System.out.println(prob+"/"+6);
    }

}

		 		   			  					  	 		      	