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

public class Main {
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		java.util.Scanner sc=new java.util.Scanner(System.in);
	int n1=0;
	n1=sc.nextInt();
	int n2=sc.nextInt();
int max =Math.max(n1, n2);
int prob=6-max+1;
if(prob==2||prob==4){
	System.out.print(prob/2);
	System.out.print('/');
	System.out.print(3);
}
if(prob==3){
	
	System.out.print(prob/3);
	System.out.print('/');
	System.out.print(2);	
}
if(prob==6){
	
	System.out.print("1/1");
}
if(prob==0){
	
	System.out.print("0/1");
}
	}
	}

