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 ;
import java.math.*;
import java.util.*;
public class Hi {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		int a = input.nextInt();
		int b= input.nextInt();
		int ans =1 ; 
		//System.out.print(gcd(3,6));
		ans+= 6 - Math.max(a, b);
		//System.out.print(ans);
		int num = ans / gcd(ans,6);
		int dum = 6/gcd(ans,6);
		System.out.printf("%d/%d",num,dum);
		
			
		}
	
	public static int gcd(int x, int y ){
		if(x==0)
			return y ;
		if(y==0)
			return x ;
		else{
			return (x>y)?gcd(x%y, y):gcd(x,y%x);
		}
	}

		

		
		
		
							
	}

	


	

		
	
		
	


			
		
		
			

		
		


