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

public class Test
{
	public static void Main()
	{
		var ptrn = @"[^\x20-\x21\x23-\x25\x28-\x2E\x30-\x3B\x3F-\x7E\xA0-\xFF]";
		var ptrn2 = @"^[\x20-\x21\x23-\x25\x28-\x2E\x30-\x3B\x3F-\x7E\xA0-\xFF]{0,40}$";
		var str = "  some text here ";
		if (str.Length > 40 || Regex.IsMatch(str, ptrn))
            Console.WriteLine("1 - The line is too long or contains invalid char(s)!");
        str = "1234567890 1234567890 1234567890 1234567890 1";
		if (str.Length > 40 || Regex.IsMatch(str, ptrn))
            Console.WriteLine("2 - The line is too long or contains invalid char(s)!");
        str = "1234567890 1234567890 1234567890 1234567890";
		if (str.Length > 40 || Regex.IsMatch(str, ptrn))
            Console.WriteLine("3 - The line is too long or contains invalid char(s)!");
            
        str = "  some text here ";
		if (Regex.IsMatch(str, ptrn2))
            Console.WriteLine("2.1 - The line is too long or contains invalid char(s)!");
        str = "1234567890 1234567890 1234567890 1234567890 1";
		if (Regex.IsMatch(str, ptrn2))
            Console.WriteLine("2.2 - The line is too long or contains invalid char(s)!");
        str = "1234567890 1234567890 1234567890 1234567890";
		if ( Regex.IsMatch(str, ptrn2))
            Console.WriteLine("2.3 - The line is too long or contains invalid char(s)!");
	}
}