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 Problem9_A {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
	//	System.out.println("Enter Yakko's roll");
		int Y = input.nextInt();
		
		//System.out.println("Enter W's roll");
		int W = input.nextInt();
		
		int prob = (6-Math.max(Y, W) + 1) ;
		if (prob==0)
				System.out.println("0/1");
		else
			
			for (int i=2;i<=3;i++){
				if (prob%i==0&&6%i==0)
				{
					System.out.println((prob/i)+"/"+(6/i));
					break;
				}
			}
	}

}
