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 Sheet3{
 
    public static void main(String[] args) {
            Scanner input = new Scanner(System.in);
 int x ,y,d;
 x=input.nextInt();
 y=input.nextInt();
 d=7-Math.max(y, x);
        switch (d) {
            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("4/6");    break;
            case 5:   System.out.println("5/6");    break;
            case 6:   System.out.println("1/1");    break;
            default: System.out.println("0/1"); break;
                
        }

            
}
      }


