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.io.*;
import static java.lang.Math.*;
import java.util.*;
public class CF {
    String solve(String line){
	int y = Integer.parseInt(line.split(" ")[0] );
	int w = Integer.parseInt(line.split(" ")[1] );
 
	int max = max(y,w);
	int n=6-max+1,d=6;
	int gcd = gcd(n,d);
	return n/gcd +"/"+d/gcd; 
    }
    public static int gcd(int m, int n) {
	return m!=0 ? gcd(n%m, m) : n;
    }
    public void run(String[] args) {
	try{
	    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	    String str = br.readLine();
	    System.out.println( solve(str) );

	}catch(Exception e){ e.printStackTrace(); }
    }
    public static void main(String[] args){
	Locale.setDefault(Locale.US);
	(new CF()).run(args);
    }
}