using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace birthday {
    public static class HappyBirthday {
        public static string BirthdayMessage(string personName, int numberOfPresents, bool isHavingParty) {
        return "Happy Birthday " + personName + ".\n" + "Number of presents: " + numberOfPresents.ToString() + ".\n" + personName + " is " + (isHavingParty ? "" : "not") + " having a party.";
    }
}