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 cls_div2_9_DieRoll {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int y = scan.nextInt();
        int w = scan.nextInt();
        
        int max = Math.max(y, w);
        max = 7 - max;
        
        switch (max){
                case 0: System.out.println("0/1");break;
                case 1: System.out.println("1/6");break;
                case 2: System.out.println("1/3");break;
                case 3: System.out.println("1/2");break;
                case 4: System.out.println("2/3");break;
                case 5: System.out.println("5/6");break;
                default: System.out.println("1/1");break;
        }
                                            
    }
}
