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.io.IOException;
import java.util.Scanner;

public class A9 {
	public static String rez(int m) {
		switch (m) {
		case 1:
			return "1/1";
		case 2:
			return "5/6";
		case 3:
			return "2/3";
		case 4:
			return "1/2";
		case 5:
			return "1/3";
		case 6:
			return "1/6";
		}
		return null;
	}

	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int m = Math.max(a, b);
		System.out.println(rez(m));
	}
}
