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If a word conforms to a special rule, I call it a Bandit Word™.

Use the following examples below to find the rule.

BANDIT WORD™ NOT BANDIT WORD™
popgun rifle
trysts date
turgut aslan
warcry attack
plus minus
possum rat
worsts best
ryukyu japan
rotgut claret
workup degeneration

And, if you want to analyze, here is a CSV version:

BANDIT WORD™, NOT BANDIT WORD™
popgun, rifle
trysts, date
turgut, aslan
warcry, attack
plus, minus
possum, rat
worsts, best
ryukyu, japan
rotgut, claret
workup, degeneration

Hint #1:

First I wanted to make a puzzle called "What is an Orbit Word™?", but it didn't really work out... Then I changed the rule a bit and it became "What is a Bandit Word™?".

Hint #2:

Sorry, I'll never post such strong hints in chat again :P I'm just editing the link in here for "fairness"

This is my first Word™ puzzle, so feedback is obviously welcome! I hope it's not too easy...

Lukas Rotter
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    Is it significant that all letters are lower-case? – Rand al'Thor Sep 21 '16 at 14:57
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    @randal'thor Yes. –  Sep 21 '16 at 14:57
  • Does it have something to do with opposites? – Buffer Over Read Sep 21 '16 at 15:46
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    is the 's' necessary in "worsts" or is it an error?? – Sid Sep 21 '16 at 15:47
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    @TheBitByte If you mean opposites as in two words in the same row: No, e.g. "rifle" could be swapped with "minus" and it would still be a valid list. If you mean opposites directly in Bandit words: Not directly, but you definitely have to compare things. –  Sep 21 '16 at 15:51
  • @LukasRotter I meant like "plus" and "minus" are opposites – Buffer Over Read Sep 21 '16 at 15:53
  • @Sid Well, it's debatable whether "worst" is a Bandit word (I would say no), but "worsts" definitely is one, so it wasn't a mistake. It just so happens that the word list I used contained "worsts", so I trusted it. –  Sep 21 '16 at 15:54

1 Answers1

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A word is a Bandit Word if

it has an even number of letters, and when you take its letters in pairs (po/pg/un or tr/ys/ts), glom each pair's ASCII codes together in binary to make a 16-bit number, and then AND those bits in pairs to get 8 bits again (e.g., po -> 01110000/01101111 -> 01/11/00/00/01/10/11/11 -> 01000011) and interpret them as ASCII ... the result is again a word.

The Bandit Words here yield

CAB, DEE, DAD, PAD, BE, CUB, SEE, DAD, CAD, SAD.

[Earlier I remarked that "at least two more N..Z letters than A..M letters" also explains the given data, but of course this property is more interesting and is clearly what Lukas had in mind. In case it's not obvious: BANDIT = B(AND)IT = AND on BITs.]

Gareth McCaughan
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