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.*;

 public class contest
{
     public static void main(String args[])
   {
       Scanner br=new Scanner(System.in);
      int n=br.nextInt();
      int m=br.nextInt();
      int max=0;
      int cont=6,chances=0;
      if(n>=m)
      max=n;
      else
      max=m;
      chances=6-max+1;
      for(int i=2;i<=chances;i++)
      {
          if(6%i==0&&chances%i==0)
          {
              cont=cont/i;
              chances=chances/i;
          }
      }System.out.print(chances+"/"+cont);
      
    }     
       
     
   }    