(1) names are constructed hierarchically. The highest (2) of the hierarchy is the last component or (3) of the DNS (4). The present restriction on the (5) of (6) names is 63 characters, and the labels are (7) insensitive. A maximum length of 255 characters is allowed. Labels must start with a (8) and can only consist of a subset of ASCII characters letters, digits and hyphens, preventing many languages from representing their names and words correctly. It is also (9) to use the final two letters (10) for indicating the country of origin. The examples include cn, representing the People's Republic of China, uk, representing the United Kingdom, and jp for Japan.