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;
import java.util.Arrays;

public class JavaApplication12 {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int y = input.nextInt();
        int w = input.nextInt();
        int temp = 0;
        int f = 0;;
        if (y < w) {
            y = w;
        }
        
        while (temp + y != 6) {
            temp++;
        }
        y = 6;
        temp++;
        if (y%temp==0){
            System.out.println(temp/temp+"/"+(y/temp));
        }
        else {
            if (temp==5){
                System.out.println(temp+"/"+(y));
            }
            else {
                System.out.println(temp/2+"/"+y/2);
            }
        }
    }
}
