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 Pa {

	public static void main(String[] args) {
Scanner in = new Scanner(System.in);
		int y = in.nextInt();
		int w = in.nextInt();
		int max=0;
		if (y>w)
			max=y;
		else 
			max=w;
		int sum=0;
		while(max<=6) {
			++sum;
			++max;
		}
		if (sum==0) {
			System.out.println("0/1");
		}
		else if (sum==1) {
			System.out.println("1/6");
		}
		else if (sum==2) {
			System.out.println("2/6");
		}
		else if (sum==3) {
			System.out.println("1/2");
		}
		else if (sum==4) {
			System.out.println("4/6");
		}
		else if (sum==5) {
			System.out.println("5/6");
		}
		else if (sum==6) {
			System.out.println("1/1");
		}
		in.close();
	}
	
}