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.*;

public class a_DieRoll {
    public static BufferedWriter wr = new BufferedWriter(new OutputStreamWriter(System.out));
    public static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));


    //Simulation with index

    public static void main(String args[]) throws IOException {
        String stones[] = br.readLine().split(" ");
        int max = (int)Math.max(Integer.parseInt(stones[0]),Integer.parseInt(stones[1]));

        int chances = 6*(((max-1)/6) + 1)-(max-1);
        int space = 6*(((max-1)/6) + 1);
        long gcd = gcd(chances,space);

        wr.write(String.valueOf(chances/gcd)+"/"+String.valueOf(space/gcd));
        wr.flush();
    }

    public static long gcd(long a, long b) {
        return b == 0 ? a : gcd(b, a % b); // Not bad for one line of code :)
    }

}

    	 	       		 	 		   	