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.Scanner;

public class MAIN {

	public static void main(String[] args) throws java.lang.Exception {
		Scanner input = new Scanner(System.in);
		int y = 0, w = 0, A = 0, B = 0;
		String x;
		x = input.nextLine();
		x = x.replaceAll("\\s+", "");
		int D = Integer.parseInt(x);
		y = D / 10;
		w = D % 10;

		B = y + w;
		if (y > w)
			A = B - y + 1;
		if (w > y)
			A = B - w + 1;
		int G = GCD(A, B);
		System.out.println(A / G + "/" + B / G);

	}

	public static int GCD(int a, int b) {
		if (b == 0)
			return a;
		return GCD(b, a % b);
	}
}