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 Main {

    public static void main(String args[]) throws Exception {
        Scanner in = new Scanner(System.in);
        int X = in.nextInt();
        int Y = in.nextInt();

        int big = X > Y ? X : Y;

        int Z = (6 - big) + 1;
        for (int i = 6; i > 0; i--) {
            if (Z % i == 0 && Z != 0) {
                Z = Z / i;
                System.out.println(Z + "/" + (6/i));
                break;
            }
        }
    }
}
