using System;
 
public class Test
{
	public static string GetPass(int x)
	{
	  string str = "";
	  Random random = new Random();
	  while (str.Length < x)
	  {
	    /* This is the range for ASCII
	       So converting from an int to a char will return a valid ASCII character
	    */
	    char c = (char) random.Next(33, 125);
	    if (char.IsLetterOrDigit(c))
	      str += c;
	  }
	  return str;
	}
 
	public static void Main()
	{
		var password = GetPass(new Random().Next(20, 30));
		Console.WriteLine(password);
	}
}

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