using System;
using System.Globalization;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace loopExr_10_partyInvitation
{
    class Program
    {
        static void Main(string[] args)
        {
            // declare variables
            string name = "";
            int allNames = 0;
            int invited = 0;

            while (true)
            {
                name = Console.ReadLine();

                if (name == "Statistic") break;
                if (name == "") Console.WriteLine("Invalid name!");
                int letters = 0;

                // loop each letter
                for (int i = 0; i < name.Length; i++)
                {
                    int n = (int)name[i];

                    // check if it is a latin letter
                    if ((n >= 65 && n <= 90) || (n >= 97 && n <= 122))
                    {
                        letters++;
                    }
                }
                // Console.WriteLine($"all - {name.Length}, valid = {letters}");
                // if all letters are here so it is valid name
                if (letters == name.Length)
                {
                    TextInfo myTI = new CultureInfo("en-US", false).TextInfo;
                    Console.WriteLine(myTI.ToTitleCase(name));
                    invited++;
                }
                else
                {
                    Console.WriteLine("Invalid name!");
                }

                // count all names
                allNames++;
            }

            // print the statistic
            Console.WriteLine($"Valid names are {100.00 * invited / allNames:F2}% from {allNames} names.");
            Console.WriteLine($"Invalid names are {100.00 * (allNames - invited) / allNames:F2}% from {allNames} names.");
        }
    }
}