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.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

public class A9{

    public static void main(String[] args) throws IOException{
        InputStreamReader input = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(input);

        String die = br.readLine();
        String[] dieVal = die.split(" ");
        int[] rolls = new int[2];
        rolls[0] = Integer.parseInt(dieVal[0]);
        rolls[1] = Integer.parseInt(dieVal[1]);

        int large = rolls[0] >= rolls[1] ? rolls[0] : rolls[1];

        String forDot = large == 1 ? "1/1" : (large == 2 ? "5/6" : (large == 3 ? "2/3" : (large == 4 ? "1/2" : (large == 5 ? "1/3" : (large == 6 ? "1/6" : "0")))));
        System.out.println(forDot);
    }
}
