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

public class Acm {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
       java.util.Scanner scan=new java .util.Scanner(System.in);
       int y=scan.nextInt();
       int w=scan.nextInt();
       int big=0;
       int same=0;
       
       if(y>w){big=y;}
       else
           if(w>y){big=w;}
       else
               if(w==6&&y==6){System.out.println("0/0");}
       else
                   if(w==y){
                   big=w;}
       
    
switch(big){
     case 1:
         
         System.out.println("1/1");
         break;
     case 2:
         System.out.println("5/6");
         break;
     case 3:
         System.out.println("2/3");
         break;
     case 4:
         System.out.println("1/2");
         break;
     case 5:
         System.out.println("1/3");
         break;
     case 6:
         System.out.println("1/6");
         break;
    }

     
       
       
       
       
      
       
    }
    
}
