object Main extends App {
	val line1 = "127.0.0.1 ssl.google-analytics.com"
	val line2 = "#127.0.0.1 ssl.google-analytics.com"
	val line3 = "127.0.0.1 ssl.google-analytics.com # Comment"
	val line4 = "#127.0.0.1 ssl.google-analytics.com # Comment"
 
	val lineRegex = """(^#?).*(?:127\.0\.0\.1)\s+((?!-)[A-Za-z0-9-\.]{1,63}(?<!-)\.+[A-Za-z]{2,6})(?:\s+(#?.*))?""".r
	val m = lineRegex.findFirstMatchIn(line2).get
 
	println(line2.substring(m.start(1), m.end(1)))  // Should be # or ""
	println(line2.substring(m.start(2), m.end(2)))  // Should be ssl.google-analytics.com
	if (m.group(3) != null) println(line2.substring(m.start(3), m.end(3))) // Should be # Comment or ""
}

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