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 W = in.nextInt(), Y = in.nextInt(), prob = 6 - Math.max(W, Y) + 1;
		if (prob == 6)
			System.out.println("1/1");
		else if (prob == 5)
			System.out.println("5/6");
		else if (prob == 4)
			System.out.println("2/3");
		else if (prob == 3)
			System.out.println("1/2");
		else if (prob == 2)
			System.out.println("1/3");
		else if (prob == 1)
			System.out.println("1/6");
		else if (prob == 0)
			System.out.println("0/1");

		in.close();
	}

}
