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;

public class Program {
    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);
        int Y = input.nextInt();
        int W = input.nextInt();

        int max = Math.max(Y, W);
        System.out.println(getProbabilty(max, W));
    }

    private static String getProbabilty(int max, int w) {
        int numerator = 6 - max + 1;
        int commonFactor = 1;

        if(numerator % 2 == 0)
            commonFactor = 2;
        else if ((numerator % 3 == 0))
            commonFactor = 3;

        numerator = getNumerator(numerator, commonFactor);
        return numerator + "/" + (6/commonFactor);
    }

    private static int getNumerator(int numerator, int commonFactor) {
        if(numerator == 0)
            return 0;
        return numerator/commonFactor;
    }
}
