import java.util.*;

public class Main {
    public static void main (String[] args) {
        Scanner in = new Scanner(System.in);
        String one = in.next();
        String two = in.next();
        in.close();
        int ans = 31;
        if (one.charAt(0) == 'S') {
            ans++;
            if (two.charAt(0) == 'S') {
                ans++;
            }
        }
        System.out.printf("8/%d\n", ans);
    }
}