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.*;
import java.math.BigInteger;
public class sol{
    
    
    public static void main(String args[])
    {
       Scanner s=new Scanner(System.in);
       int a=s.nextInt();
       int b=s.nextInt();
       int c=Math.max(a,b);
       if(c==1)
        System.out.println("1/1");
    else if(c==2)
      System.out.println("5/6");
     else if(c==3)
       System.out.println("2/3");
     else if(c==4)
       System.out.println("1/2");
     else if(c==5)
       System.out.println("1/3");
     else
       System.out.println(0/1);
       
       
       
       
}
   
}
