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

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
import java.util.Scanner;

/**
 *
 * @author HP
 */
public class Problem21Level1 {

    /**
     * @param args the command line arguments
     */
    //A. Die Roll
    //http://codeforces.com/contest/9/problem/A
    public static void main(String[] args) {
        // TODO code application logic here
        Scanner scanner = new Scanner(System.in);

        int y = scanner.nextInt();
        int w = scanner.nextInt();
        int numerator = 0, denmerator = 6;
        int largest = 0, gcd = 0;
        if (y > w) {
            numerator = 6 - y + 1;
        } else {
            numerator = 6 - w + 1;
        }



        if (numerator > denmerator) {
            largest = numerator;
        } else {
            largest = denmerator;
        }

        for (int i = largest; i >= 2; i--) {
            if (numerator % i == 0 && denmerator % i == 0) {
                gcd = i;
                break;
            }
        }
        if (gcd != 0) {
            numerator /= gcd;
            denmerator /= gcd;
        }

        System.out.println(numerator + "/" + denmerator);
    }
}
