打印出文件中第一次出现的单词，以字母表中的每个字母开头问题的回答

打印出文件中第一次出现的单词，以字母表中的每个字母开头

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我有一个档案，里面有形容词a-Z的列表 如何打印第一个以A开头的单词，然后打印第一个以B开头的单词。。。一直到Z？ 我想格雷普可能是个好办法。但对其他人开放，awk，python…other。在 一些示例输出： <pre><code>$ cat adjectives.txt | head Adamant: unyielding; a very hard substance Adroit: clever, resourceful Amatory: sexual Animistic: quality of recurrence or reversion to earlier form Antic: clownish, frolicsome Arcadian: serene Baleful: deadly, foreboding Bellicose: quarrelsome (its synonym belligerent can also be a noun) Bilious: unpleasant, peevish Boorish: crude, insensitive $ cat adjectives.txt | grep '^[ABCDE]' | head Adamant: unyielding; a very hard substance Adroit: clever, resourceful Amatory: sexual Animistic: quality of recurrence or reversion to earlier form Antic: clownish, frolicsome Arcadian: serene Baleful: deadly, foreboding Bellicose: quarrelsome (its synonym belligerent can also be a noun) Bilious: unpleasant, peevish Boorish: crude, insensitive </code></pre> 所以我的示例输出是： ^{pr2}$ 从<a href="https://www.dailywritingtips.com/100-exquisite-adjectives/" rel="nofollow noreferrer">here</a>完整归档 <pre><code>$ cat adjectives.txt Adamant: unyielding; a very hard substance Adroit: clever, resourceful Amatory: sexual Animistic: quality of recurrence or reversion to earlier form Antic: clownish, frolicsome Arcadian: serene Baleful: deadly, foreboding Bellicose: quarrelsome (its synonym belligerent can also be a noun) Bilious: unpleasant, peevish Boorish: crude, insensitive Calamitous: disastrous Caustic: corrosive, sarcastic; a corrosive substance Cerulean: sky blue Comely: attractive Concomitant: accompanying Contumacious: rebellious Corpulent: obese Crapulous: immoderate in appetite Defamatory: maliciously misrepresenting Didactic: conveying information or moral instruction Dilatory: causing delay, tardy Dowdy: shabby, old-fashioned; an unkempt woman Efficacious: producing a desired effect Effulgent: brilliantly radiant Egregious: conspicuous, flagrant Endemic: prevalent, native, peculiar to an area Equanimous: even, balanced Execrable: wretched, detestable Fastidious: meticulous, overly delicate Feckless: weak, irresponsible Fecund: prolific, inventive Friable: brittle Fulsome: abundant, overdone, effusive Garrulous: wordy, talkative Guileless: naive Gustatory: having to do with taste or eating Heuristic: learning through trial-and-error or problem solving Histrionic: affected, theatrical Hubristic: proud, excessively self-confident Incendiary: inflammatory, spontaneously combustible, hot Insidious: subtle, seductive, treacherous Insolent: impudent, contemptuous Intransigent: uncompromising Inveterate: habitual, persistent Invidious: resentful, envious, obnoxious Irksome: annoying Jejune: dull, puerile Jocular: jesting, playful Judicious: discreet Lachrymose: tearful Limpid: simple, transparent, serene Loquacious: talkative Luminous: clear, shining Mannered: artificial, stilted Mendacious: deceptive Meretricious: whorish, superficially appealing, pretentious Minatory: menacing Mordant: biting, incisive, pungent Munificent: lavish, generous Nefarious: wicked Noxious: harmful, corrupting Obtuse: blunt, stupid Parsimonious: frugal, restrained Pendulous: suspended, indecisive Pernicious: injurious, deadly Pervasive: widespread Petulant: rude, ill humored Platitudinous: resembling or full of dull or banal comments Precipitate: steep, speedy Propitious: auspicious, advantageous, benevolent Puckish: impish Querulous: cranky, whining Quiescent: inactive, untroublesome Rebarbative: irritating, repellent Recalcitrant: resistant, obstinate Redolent: aromatic, evocative Rhadamanthine: harshly strict Risible: laughable Ruminative: contemplative Sagacious: wise, discerning Salubrious: healthful Sartorial: relating to attire, especially tailored fashions Sclerotic: hardening Serpentine: snake-like, winding, tempting or wily Spasmodic: having to do with or resembling a spasm, excitable, intermittent Strident: harsh, discordant; obtrusively loud Taciturn: closemouthed, reticent Tenacious: persistent, cohesive, Tremulous: nervous, trembling, timid, sensitive Trenchant: sharp, penetrating, distinct Turbulent: restless, tempestuous Turgid: swollen, pompous Ubiquitous: pervasive, widespread Uxorious: inordinately affectionate or compliant with a wife Verdant: green, unripe Voluble: glib, given to speaking Voracious: ravenous, insatiable Wheedling: flattering Withering: devastating Zealous: eager, devoted </code></pre>

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打印出文件中第一次出现的单词，以字母表中的每个字母开头

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