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.lang.reflect.Array;
	import java.util.Arrays;
	import java.util.Scanner;
	
	public class MainTesto {
	
		public static void main(String[] args) {
			
			Scanner sc = new Scanner(System.in);
			int n1 = sc.nextInt();
			int n2 = sc.nextInt();
			int max = 7-Math.max(n1, n2);
			int gcd = 1;
		    for (int i = 1; i <= max && i <= 6; i++) {
		        if (max % i == 0 && 6 % i == 0) {
		            gcd = i;
		        }
		    }
		    System.out.println(max/gcd +"/"+6/gcd);
		}
	}
