// assume email address is valid
public class Email
{
	public static void main(String[] args)
	{
		System.out.println();
		String s = "news@cnn.com";

		String username = "";
		int pos = 0;
		while (s.charAt(pos) != '@')
		{
			username += s.charAt(pos);
			++pos;
		}

		++pos;
		String server = "";
		while (s.charAt(pos) != '.')
		{
			server += s.charAt(pos);
			++pos;
		}

		++pos;
		String domain = "";
		while (pos < s.length())
		{
			domain += s.charAt(pos);
			++pos;
		}

		System.out.println("domain: " + domain);
		System.out.println("server: " + server);
		System.out.println("username: " + username);
		
	}
}