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 a = in.nextInt();
		int b = in.nextInt();
		in.close();
		
		switch (Math.max(a, b)) {
			case 1: System.out.println("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: break;
		}
	}
}