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 Main {

	public static void main(String[] args) {
		Die_Roll();
	}
	public static void Die_Roll() {
		Scanner scan = new Scanner(System.in);
		int A = scan.nextInt();
		int B = scan.nextInt();
		int larger = getMax(A,B);
		int numbers = 6 - larger +1;
		if(numbers == 0)
			System.out.println("0/1");
		if(numbers == 6)
			System.out.println("1/1");
		else if(numbers % 3 == 0)
			System.out.println(numbers/3 +"/2");
		else if(numbers % 2 == 0)
			System.out.println(numbers/2 + "/3");
		else
			System.out.println(numbers + "/6");
	}
	public static int getMax(int a, int b) {
		  return (a>b?a:b);
		}
}