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.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;


public class dieRoll {
    public static void main(String args []) throws IOException
    {
        //BufferedReader cin  = new BufferedReader(new FileReader("c:\\input.txt"));
        BufferedReader cin = new BufferedReader(new InputStreamReader(System.in));
        String [] s = cin.readLine().split(" ");
        int r1 = Integer.parseInt(s[0]);
        int r2 = Integer.parseInt(s[1]);
        int max = -1;
        if (r1 > r2)
            max = r1;
        else
            max = r2;
        int prob = 6 - max + 1;
        if (prob == 1)
        {
            System.out.println("1/6");
        }
        else if (prob == 2)
        {
            System.out.println("1/3");
        }
        else if (prob == 3)
        {
            System.out.println("1/2");
        }
        else if (prob == 4)
        {
            System.out.println("2/3");
        }
        else if (prob == 5)
        {
            System.out.println("5/6");
        }
        else
        {
            System.out.println("1/1");
        }
        
    }
}
