using System;

public class Test
{
	public static void Main()
	{
		// your code goes here
		string s1=null;
		string s2=string.Empty;
		
		Console.WriteLine(s2.Trim());
		Console.WriteLine(s2.Trim().Length);

//	Console.WriteLine(s1.Trim());
//	Console.WriteLine(Convert.ToString(s1).Trim());
	}
}