含有正序全部5個母音的英文單字

英文全部5個母音是 a, e, i, o, u，要找到這些母音依序出現的英文單字：

• cat /usr/share/dict/words | \
  grep -E "[aA]+[^aeiouAEIOU]*[eE]+[^aeiouAEIOU]*[iI]+[^aeiouAEIOU]*[oO]+[^aeiouAEIOU]*[uU]+" | \
  xargs -n4 -d'\n'

這邊用到兩個操作子：

• ^：代表否定
• *：代表存在0個到多個字母

在這個資料庫裡面總共有54個，每4個一行列出來如下：

abstemious abstemiously abstemiousness abstentious
acheilous acheirous acleistous Aegiochus
affectious aleikoum anemious annelidous
Areithous arsenious arterious bacteriofluorescin
bacteriopurpurin bacterious beggar-my-neighbour caesious
facetious facetiously facetiousness fracedinous
half-serious half-seriously Lapeirousia majestious
metarsenious nonabstemious nonabstemiously nonabstemiousness
nonfacetious nonfacetiously nonfacetiousness overabstemious
overabstemiously overabstemiousness parecious pareciously
pareciousness pyroarsenious sexagesimo-quarto sulpharsenious
sulphoarsenious thioarsenious tragedious unabstemious
unabstemiously unabstemiousness unabstentious unfacetious
unfacetiously unfacetiousness

參考資料

• 英文中含有正序全部 5 個母音字母的單字：只有列出兩個：”abstemious” (節儉的；有節制的) 和 “facetious” (亂開玩笑的；荒唐可笑的)
• How to merge every two lines into one from the command line?

_EOF_