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.*;

public class Coding{
	public static void main(String args[]){
		Scanner sc=new Scanner(System.in);
		
		long a=sc.nextLong();
		long b=sc.nextLong();
		long max=0;
		long count=0;
		if(a>b)
			max=a;
		else
			max=b;
		
		
		long dummy=6;
		count=6-max+1;
		if(dummy%count==0){
			dummy/=count;
			count=1;
		}
		if(count==4){
			dummy=3;
			count=2;
		}
			
		
		
			System.out.println(count+"/"+dummy);
		
	}
}