Four-letter word words of this length are upsetting to some, for religious or personal sensitivity reasons, such as: "" (UK), "", "", "", and "" (UK). Racist, ableist, and slurs pertaining to an individual's sexual orientation may also qualify, such as "" (in the UK not a racial slur, but short for Mongol, or someone with Down syndrome - previously called Mongolism), "", "", "", "", "" and "". Several "four-letter words" have multiple meanings (some even serving as given names), and usually only offend when used in their vulgar senses, for example: "", "", "" (UK) and "" (UK). A borderline
AND-OR-Invert be represented by the boolean equation and truth table: formula_1 The 2-2 AOI gate will always output 0 if three or all four inputs are 1, and 1 if three or all four inputs are 0. A 2-1 AOI gate can be represented by following the boolean equation and truth table: formula_2 Larger AOI gates, such as 4-3 AOI or 3-3-3 AOI can also be used. AND-OR-INVERT(AOI) and OAI gates can be readily implemented in CMOS circuitry. AOI gates are particularly advantaged in that the total number of transistors (or gates) is less than if the AND, NOT, and OR