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 codeforces
{	

	private static int gcd(int a,int b)
	{
		if(b==0)
			return a;

		return gcd(b,a%b);
	}
	public static void main(String[] args) 
	{
		Scanner s=new Scanner(System.in);
		
		int a=s.nextInt();
		int b=s.nextInt();

		int max=Math.max(a,b);
		int num=6-max+1;

		int div=gcd(6,num);
		num/=div;
		int den=6/div;

		System.out.println(num+"/"+den);
	}
}