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

//package codeforcesQuestions;

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class cdf9a 
{
	 static int gcd(int a, int b) 
    { 
      if (b == 0) 
        return a; 
      return gcd(b, a % b);  
    }
	public static void main(String args[])throws Exception
    {
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        String s=br.readLine();
        String ss[]=s.split(" ");
        int a=Integer.parseInt(ss[0]);
        int b=Integer.parseInt(ss[1]);
        if(b>a)
        {
        	int temp=b;
        	b=a;
        	a=temp;
        }
        int x=7-a;
        int gc=gcd(x,6);
        System.out.print(x/gc+"/"+6/gc);
    }
}
