using System;
using System.Text.RegularExpressions;

public class Test
{
	public static void Main()
	{
		Console.WriteLine(Regex.IsMatch("FooBar\n", @"^[A-Z]([a-z][A-Z]?)+$"));
		Console.WriteLine(Regex.IsMatch("FooBar\n", @"^[A-Z]([a-z][A-Z]?)+\z"));
	}
}