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 A_9_Die_Roll {
	public static void main(String[] args){
		Scanner input=new Scanner(System.in);
		int a=input.nextInt();
		int b=input.nextInt();
		int maximum;
		if(a>=b)
			maximum=a;
		else
			maximum=b;
		
		if(maximum==1)
			System.out.println("1/1");
		else if(maximum==2)
			System.out.println("5/6");
		else if(maximum==3)
			System.out.println("2/3");
		else if(maximum==4)
			System.out.println("1/3");
		else if(maximum==5)
			System.out.println("1/3");
		else if(maximum==6)
			System.out.println("1/6");
	}
}
