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 {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		int no1 = in.nextInt();
		int no2 = in.nextInt();
		int maxpro = 6;
		int noPropality;
		if (no2 > no1) {
			noPropality = maxpro - no2;
		} else {
			noPropality = maxpro - no1;
		}
		if (noPropality == 0) {
			System.out.println("0/1");
		} else {
			noPropality++;
			if (6 % noPropality == 0) {
				System.out.println("1/" + 6 / noPropality);
			} else {
				if (noPropality % 2 == 0) {
					System.out.println(noPropality / 2 + "/" + maxpro / 2);
				} else {
					System.out.println(noPropality+ "/" + maxpro);
				}
			}
		}
	}
}

