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 p13_DieRoll {

    static Scanner input = new Scanner(System.in);

    public static int[] inputArrayInt() {
        String arrayString[] = input.nextLine().split(" ");
        int arrayInt[] = new int[arrayString.length];
        for (int i = 0; i < arrayString.length; i++) {
            arrayInt[i] = Integer.parseInt(arrayString[i]);
        }
        return arrayInt;
    }

    public static void main(String[] args) {
        int[] dice = inputArrayInt();

        int max = Math.max(dice[0], dice[1]);

        int finals = 7 - max;

        switch (finals) {
            case 0:
                System.out.println("0/1");
                break;
            case 1:
                System.out.println("1/6");
                break;
            case 2:
            case 3:
                System.out.println("1/3");
                break;
            case 4:
                System.out.println("2/3");
                break;
            case 5:
                System.out.println("5/6");
                break;
            case 6:
                System.out.println("1/1");
                break;
        }

    }
}
