IDNA encoding may be illustrated using the example domain Bücher.ch. “Bücher” is German for “books”, and .ch is the ccTLD of Switzerland. This domain name has two labels, Bücher and ch. The second label is pure ASCII, and is left unchanged. The first label is processed by Nameprep to give bücher, and then converted to Punycode to result in bcher-kva. It is then prepended with xn-- to produce xn--bcher-kva. The final domain suitable for use in the DNS is therefore xn--bcher-kva.ch.