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 a9
{
	public static void main(String ar[])
	{
		Scanner ob=new Scanner(System.in);
		int n=ob.nextInt();
		int m=ob.nextInt();
		int y=Math.max(n,m);
		int x=6-y+1;
		if(x==1)
		System.out.println(1+"/"+1);
		else if(x==2)	
		System.out.println("1/3");
		else if(x==3)
		System.out.println("1/2");
		else if(x==4)
		System.out.println("2/3");
		else if(x==5)
		System.out.println("5/6");
		else
		System.out.println("1/6");
	}
}
