Word polygon each word. Further rules may be set. One letter may be highlighted, and all words made must include that letter. A minimum length for words may be set. There is always at least one word that can be made using all of the available letters, and the rules may require that a maximum length word be found. With each puzzle, a number of words to aim for is usually included as a guide, with three difficulty ratings: good, very good and excellent. Each puzzle differs in its target, depending on the letters given to work with. In Australia, "The Advertiser"
Four-letter word category includes words that are euphemistic evasions of "stronger" words, as well as those that happen to be short and have both an expletive sound to some listeners as well as a sexual or excretory meaning (many also have other, non-vulgar meanings): "" (US), "", "", "" (US), "" (UK, NZ, AUS), "" and "", as several examples. Finally, certain four-lettered terms with limited usage can be considered offensive by some, within the regional dialect in which they are used, such as "" and "mary". Occasionally the phrase "four-letter word" is humorously used to describe common words composed of four