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 Main2 {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int y , w;
        y = sc.nextInt();
        w =sc.nextInt();
        String [] array = {"1/6" , "1/3" , "1/2" , "2/3" , "5/6" , "1/1"};
        int D = Math.max(y,w);
        System.out.println(array[6-D]);
        

        sc.close();
    }
}
/**
 * import java.util.ArrayList;
 * ArrayList<Integer> input = new ArrayList<Integer>();
        
        for (int i = 0; i <3 ; i++) {
            sc.hasNextInt();
            input.add(sc.nextInt());
        }
        System.out.println(input);**/
    

