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 DieRoll_9A {
	
	public static void main(String[] args) {
		// read input
		Scanner scanner = new Scanner(System.in);
		int y = scanner.nextInt();
		int w = scanner.nextInt();
		
		// logic
		int numerator = 6 - Math.max(y, w) + 1;
		int denominator = 6;
		
		int limit = numerator;
		for (int i = 2; i <= limit; i++) {
			if (numerator % i == 0 && denominator % i == 0) {
				numerator /= i;
				denominator /= i;
			}
		}
		
		System.out.println(numerator + "/" + denominator);
		
		scanner.close();
	}
}