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 Main {
	
	public static void main(String args[])
	{
		Scanner scan= new Scanner(System.in);
		int y=scan.nextInt();
		int	w= scan.nextInt();
		int prob=0;
		
		prob += 6-Math.max(y,w)+1;
		if(prob == 0)
		{
			System.out.println(prob + "/" + 1);
		}else if(prob	%6 == 0)
		{
			System.out.println(prob/6 + "/" + 1);
		}
		else if(prob	%2 == 0)
		{
			System.out.println(prob/2 + "/" + 3);
		}else if(prob	%3 == 0)
		{
			System.out.println(prob/3 + "/" + 2);
		}
		else
			System.out.println(prob + "/"+ 6);
		
		
	}

}
