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.Arrays;
import java.util.Scanner;

public class A {
 
    public static void main(String[] args) {
        Scanner scn = new Scanner(System.in);
        int n = 6;
        int x = n - Math.max(scn.nextInt(),scn.nextInt()) + 1;
        for (int i = x; i > 0; i--) 
            if(x % i == 0 && n % i == 0) {
                x /= i;
                n /= i;
                break;
            }
        System.out.println(x + "/" + n);
    }
}