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.lang.*;
import java.io.*;
import java.util.*;
public class MyClass {
    public static void main(String args[])throws Exception {
        Scanner sc=new Scanner(System.in);
   
         BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
int a=sc.nextInt();
int b=sc.nextInt();
int max=(int) Math.max(a,b);
int d=6-max+1;
int c=1;
for(int i=1;i<=6;i++)
{
    if(d%i==0)
    c=i;
}
System.out.println((d/c) +"/"+(6/c));

 
 

      }
}
