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.io.*;
import java.util.*;
 public class die_roll
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int y=sc.nextInt();
int w=sc.nextInt();
int max=Math.max(y,w);
int n=0,d=6;
int choice=6-max+1;
n=choice;
if(n==1)
System.out.print("1/6");

else if(n==2)
System.out.print("1/3");
 else if(n==3)
System.out.print("1/2");
if(n==4)
System.out.print("2/3");
if(n==5)
System.out.print("5/6");
if(n==1)
System.out.print("1/1");
else
System.out.print("0/1");
}}