using System;
using System.IO;
using System.Text;

class Test {
  public static void Main() {
    // minimum and maximum values
    Console.WriteLine("int:   MinValue = {0}, MaxValue = {1}", 
      Int32.MinValue, Int32.MaxValue);
    Console.WriteLine("float: MinValue = {0:E5}, MaxValue = {1:E5}", 
      Single.MinValue, Single.MaxValue);
    Console.WriteLine("char:  MinValue = {0}, MaxValue = {1}", 
      (int)Char.MinValue, (int)Char.MaxValue);
    
    // base types
    Console.WriteLine("base type of int:   " + 3.GetType().BaseType.FullName);
    Console.WriteLine("base type of float: " + 3f.GetType().BaseType.FullName);
    Console.WriteLine("base type of char:  " + 'x'.GetType().BaseType.FullName);
    
    // reading a word; lower-case letters are converted to upper-case letters
    StreamReader r = File.OpenText("input.txt");
    StringBuilder buf = new StringBuilder();
    int ch = r.Read();
    while (ch >= 0) {
      if (Char.IsLetterOrDigit((char)ch)) {
        if (Char.IsLower((char)ch)) ch = Char.ToUpper((char)ch);
        buf.Append((char)ch);
      }
      ch = r.Read();
    }
    Console.WriteLine(buf.ToString());
    r.Close();
  }
}