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 CF9A {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int a1=scan.nextInt();
		int b1=scan.nextInt(); scan.close();
		int a;
	    if(a1>=b1)a=7-a1; else a=7-b1;
	    //if(6%a==0)System.out.println(6/a+"/"+6/a);
	    if(a%2==0&&a%3==0)System.out.println("1/1");
	    else if(a%2==0) System.out.println(a/2+"/"+6/2);
	    else if(a%3==0) System.out.println(a/3+"/"+6/3);
	    else System.out.println(a+"/"+6);
	    	
	}
}
