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 codeForces {
	public static void main(String[] args) {
		Scanner inp = new Scanner(System.in);
		int a=inp.nextInt(),b=inp.nextInt();
		int ans=Math.max(a, b);
		ans=6-ans+1;
		if(ans==1) System.out.println(1+"/"+6);
		else if(ans==2) System.out.println(1+"/"+3);
		else if(ans==3) System.out.println(1+"/"+2);
		else if(ans==4) System.out.println(2+"/"+3);
		else if(ans==5) System.out.println(5+"/"+6);
		else System.out.println(1+"/"+1);
		
			
	}

}