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 Problem_14 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		Scanner in = new Scanner(System.in);

		
		int first=in.nextInt();
		int second=in.nextInt();
	float third=0;
		if(first>second)
		{
			third=first;
		}else {third=second;}

		third=		6 - third+1;
///		
		
		if(third==1 && first==second)
		{
			
			System.out.println("1/6");
		}
		
		else if(third==1)
		{
			
			System.out.println("0/0");
		}
		

		else if(third==2)
		{
			
			System.out.println("1/3");
		}
		else if (third==3) {  
		 System.out.println("1/2");
		 
	 }
		else if (third==4) {  
			
		 System.out.println("2/3");
		 
	 }
		else if (third==5) {  
		 System.out.println("5/6");
		 
	 }
		else if (third==6) {  
		 System.out.println("1/1");
		 
	 }
	 
		
	 
		
	}

}
