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.math.BigInteger;
import java.util.Scanner;

public class CF {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        int y = in.nextInt();

        int w = in.nextInt();

        int n = 7 - Math.max(w, y);
        
        BigInteger j = new BigInteger(Integer.toString(n));
        BigInteger k = new BigInteger("6");
        BigInteger gc = j.gcd(k);
        if (gc.intValue() > 0) {
            System.out.println(n / gc.intValue() + "/" + 6 / gc.intValue());
        } else {
            System.out.println(n + "/" + 6);
        }

    }


}
