Algorithms for matching wildcards have been developed in a number of recursive and non-recursive varieties. Java allows the use of "type wildcards" to serve as type arguments for parameterized types. Searches may be explicit or may use wildcards/patterns or terms to be excluded. A cert with multiple wildcards in a name is not allowed. In addition, wildcards themselves can have extensions, including other wildcards. The Google Ngram Viewer, , supports searches for parts of speech and wildcards. Two Jokers can be added to the deck as additional wildcards. On the other hand, Java wildcards are themselves complex. The addition of type wildcards made Java unsound. Owing to the addition of the wildcards, the first two results were double eliminations. Generic Java was incorporated in Java with the addition of wildcards. Such controversial topics are particularly suited for extreme scenarios or wildcards. Twos and tens are wildcards, and can be played on any card. After the tournament Team F.I.S.T. began feuding with the Wildcards (Eddie Kingston and BlackJack Marciano). There were no PDC specific wildcards or Sky Sports specific wildcards.