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.*;

public class Solution {

 

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int Y = in.nextInt(), W= in.nextInt();
        Y = Math.max(Y, W);
        String answer ="";
        switch(6-Y+1){
            case 1:
                answer = "1/6";
                break;
            case 2:
                answer = "1/3";
                break;
            case 3:
                answer = "1/2";
                break;
            case 4:
                answer = "2/3";
                break;
            case 5:
                answer = "5/6";
                break;
            case 6:
                answer = "1/1";
                break;
        }
        System.out.println(answer);
        in.close();
    }
}
