using System.Text;

namespace _10_5
{
    internal class Program
    {
        static void Main(string[] args)
        {
            StringBuilder sb = new StringBuilder();
            bool bContinue = true;
            while (bContinue)
            {
                Console.Write("请输入英文单词：");
                string s =Console.ReadLine();
                if (s != "")
                {
                    sb.Append(s);
                    sb.Append(" ");
                }
                else
                {
                    bContinue = false;
                }
            }
            string str = sb.ToString();
            Console.WriteLine("共{0}字符，内容为{1}",sb.Length,str);
            string[] source = str.ToLower().Split(new char[] { '.', '?', '!', ':', '：', '，' }, StringSplitOptions.RemoveEmptyEntries);
            Array.Sort(source);
            foreach (string s in source) Console.WriteLine(s);
        }
    }
}