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) {
		Scanner sc=new Scanner(System.in);
		
		int Y=sc.nextInt();
		int W=sc.nextInt();
		
		String[] die_roll=new String[6];
		die_roll[0]="1/6";
		die_roll[1]="1/3";
		die_roll[2]="1/2";
		die_roll[3]="2/3";
		die_roll[4]="5/6";
		die_roll[5]="1/1";
		
		int start=Math.max(Y, W);
		
	System.out.println(die_roll[6-start]);
		
		
	
	
	}

}
