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.io.*;

public class Main {

    public static void main(String[] args) throws IOException {
        // write your code here

        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        String inputStones = bufferedReader.readLine();
        int first = Integer.valueOf(inputStones.split(" ")[0]);
        int second = Integer.valueOf(inputStones.split(" ")[1]);
        int max = first > second ? first : second;
        int diff = 6 - max + 1;
        switch (diff) {
            case 1:
                System.out.print("1/6");
                break;
            case 2:
                System.out.print("1/3");
                break;
            case 3:
                System.out.print("1/2");
                break;
            case 4:
                System.out.print("2/3");
                break;
            case 5:
                System.out.print("5/6");
                break;
            case 6:
                System.out.print("1/1");
                break;



        }


    }




}

