4. Personal Titles (If Construction)`

using System;

namespace PersonalTitles_If_
{
internal class Program
{
    static void Main(string[] args)
    {
        double years = double.Parse(Console.ReadLine());
        char gender = char.Parse(Console.ReadLine());

        if (years >= 16 && gender == 'm')
        {
            Console.WriteLine("Mr.");
        }
        else if (years < 16 && gender == 'm')
        {
            Console.WriteLine("Master");
        }
        else if (years >= 16 && gender == 'f')
        {
            Console.WriteLine("Ms.");
        }
        else if (years < 16 && gender == 'f')
        {
            Console.WriteLine("Miss");
        }
    }
}
}