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 TESTT {
	public static void main(String[] args) {
		
		Scanner input = new Scanner(System.in);

		int a = input.nextInt();
		int b = input.nextInt();

		if (a == b && a == 1) {
			System.out.println("1/1");
		}

		if (b > a) {
			int n = 6;
			int v = n - (b - 1);
			int c = n / v;
			if (n % v == 0) {
				System.out.println("1" + "/" + c);
			}

			else {
				System.out.println(v + "/" +  n);
			}
		}

		if (a > b) {
			int ny = 6;
			int vy = ny - (a - 1);
			int cy = ny / vy;
			if (ny % vy == 0) {
				System.out.println(1 + "/" + cy);
			}

			else {
				System.out.println(vy + "/" +  ny);
			}

			if (a == b && a != 1) {
				int nm = 6;
				int vm = nm - (a - 1);
				int cm = nm / vm;
				if (nm % vm == 0) {
					System.out.println(1 + "/" + cm);
				}

				else {
					System.out.println(vm + "/" +  nm);
				}
			}
		}
	}
}