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 A
{
   public static void main(String[] args)
   {
      new A(new Scanner(System.in));
   }

   int gcd(int a, int b){
      return b==0 ? a : gcd(b, a%b);
   }

   public A(Scanner in)
   {
      int A = in.nextInt();
      int B = in.nextInt();

      int MX = Math.max(A, B);
      int cnt = 0;
      while ((MX+cnt) <= 6)
         cnt++;

      int numer = cnt;
      int denom = 6;
      
      int g = gcd(numer, denom);
      numer = numer/g;
      denom = denom/g;

      if (numer == 0)
         denom = 1;

      System.out.printf("%d/%d%n", numer, denom);
   }
}
