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 cf1 {

	public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int x=scan.nextInt();
        int y=scan.nextInt();
        int A,B=6;
        if(x>=y)
        {
        	A=6-x+1;
        }
        else
        {
        	A=6-y+1;
        }
        if(A==B)
        {
        	A=1;
        	B=1;
        	System.out.println(A+"/"+B);
        }
        else
        {
        	if(A==4)
        	{
        		 A=2;
        		 B=3;
        		 System.out.println(A+"/"+B);
        	}
        	else if(B%A==0)
           {
        	   B=B/A;
        	   A=1;
        	   System.out.println(A+"/"+B);
           }
           else
           {
        	   System.out.println(A+"/"+B);
           }
        }
        	
      
	}

}
