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;
import java.util.StringTokenizer;
public class DieRoll {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner s = new Scanner(System.in);
		String input= s.nextLine();
		StringTokenizer ch = new StringTokenizer(input," ");
		int a = Integer.parseInt(ch.nextToken());
		int b = Integer.parseInt(ch.nextToken());
		int max;
		if(a>b) {
			max=a;
		}
		else {
			max=b;
		}
		switch (max) {
		case 1 :System.out.println("1/1");
		break;
		case 2 :System.out.println("5/6");
		break;
		case 3 :System.out.println("2/3");
		break;
		case 4 :System.out.println("1/2");
		break;
		case 5 :System.out.println("1/3");
		break;
		case 6 :System.out.println("1/6");
		break;
		default:System.out.println("0/1");
		}
		
		

	}

}
