Solution to NPR puzzle using Raspberry Pi

Intro
Take a common five-letter word. If you add an “e” to the end you’ll get a common six-letter word. or add an ‘e” after the second letter to get a different six-letter word, or an “e” after the fourth letter. what word is it?

The technique
I used the strange dictionary built in to my Raspbery Pi, in /usr/share/dict/american-english.

Key command
$ egrep '^[a‐z]{5,6}$' jhwords > /tmp/five‐six

That leaves us with 11897 words (use wc command to learn this).

Now just look at the six-letter words containing an “e” at the end:

$ egrep '^[a‐z]{5}e$' five‐six > e‐at‐end

Down to 784 words.

Now strip off the terminal “e”.

(steps skipped)

And then…

Candidate word list

ameba
ampul
aorta
avers
blond
brows
cloth
corps
demur
expos
fauna
final
flora
fondu
grill
hears
hydra
karat
larva
loath
local
madam
moral
pleas
psych
regal
scrap
sever
sooth
spars
strip
swath
teeth
tibia
uvula
vulva
zombi

You can scan by hand – the answer jumps out at you.

Conclusion
Another NPR Weekend Edition puzzle is solved by use of some simple linux commands.

References and related
Another NPR puzzle similarly solved.

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