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 sc = new Scanner(System.in);
		int y = sc.nextInt();
		int w = sc.nextInt();
		int d = 7 - Math.max(y, w);
		switch (d) {
		case 6:
			System.out.println("1/1");
			break;

		case 5:
			System.out.println("5/6");
			break;

		case 4:
			System.out.println("2/3");
			break;

		case 3:
			System.out.println("1/2");
			break;

		case 2:
			System.out.println("1/3");
			break;

		case 1:
			System.out.println("1/6");
			break;

		default:
			break;
		}
	}

}
