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 sc=new Scanner(System.in);	
		int a=sc.nextInt();
	    int b=sc.nextInt();	   
	    int num=f(a,b,1);
	    int t=6;
	    int gy=s(num,t);
	    num=num/gy;
	    t=t/gy;
	    System.out.println(num+"/"+t);
}

	private static int s(int num, int t) {
		int x;
		if(num<t) {
			x=t;
			t=num;
			num=x;		
		}
		for(int i=t;i>0;i--) {
			if(num%i==0&&t%i==0)
				return i;
			
		}
		return 0;
	}

	private static int f(int a, int b,int c) {				
		if(c==6)
			return 1;
		if(c>=a)
		return f(a,b,c+1)+1;
		return f(a,b,c+1);
		
		
	}
}