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.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Scanner;
import java.util.Set;

/**
 *
 * @author MahmoudSamir
 */
public class Main {

    public static Scanner in = new Scanner(System.in);

    public static void main(String[] args) {
        int x = in.nextInt();
        int y = in.nextInt();
        int z = Math.max(x, y);
        int numerator = (6 - z) + 1;
        int demo = 0;
        if (6 % numerator == 0) {
            demo = 6 / numerator;
            numerator /= numerator;
        } else if (numerator % 2 == 0) {
            demo = 6 / 2;
            numerator /= 2;
        }else if (numerator%2!=0){
            demo = 6;
        }
        System.out.println(numerator + "/"+demo);
    }

}
