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 Die_Roll {
	static int gcd(int x,int y)
	{
	    if(x==0)
	        return y;
	    return gcd(y%x,x);
	}

	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		
		int x=sc.nextInt(),y=sc.nextInt();
		
		int a=Math.max(x, y);
		a=6-a+1;
		int g=gcd(a,6);
		
		System.out.println((a/g)+"/"+(6/g));
		

	}

}
