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 Main {
	

    public static void main(String args[]){
    	Scanner sc = new Scanner(System.in);

    	int x = sc.nextInt(), y = sc.nextInt();
    	int max = Math.max(x, y);
    	int sides = 6;
    	int n = sides - max +1;
    	System.out.println(n/gcd(n,sides) + "/" + sides/gcd(n,sides));
    	sc.close();
    }
    
    static int gcd(int x, int y){
    	if(y == 0)
    		return x;
    	else
    		return gcd(y, x%y);
    }
}
