BrowserUk,
Hopefully my code won't take longer than 24 hours to run (against the 2of12inf.txt). I too find these results odd. If I haven't any logic bugs or fence post errors, my code will put any doubt to rest though I suspect you will figure it out before my code finishes ;-)
Update: My code only took 12 minutes and it disagrees with your results. I manually checked and I think you must have a bug somewhere. Your winning solution (aeilprst: 552) really only gets 344. I even included duplicates (if there were any) to try and account for the delta but came up empty handed. See below:
#!/usr/bin/perl
use strict;
use warnings;
my %winner = map {$_ => undef} qw/a e i l p r s t/;
open(my $fh, '<', '2of12inf.txt') or die "Unable to open '2of12inf.txt
+' for reading: $!\n";
WORD:
while (<$fh>) {
chomp;
$_ = lc($_);
tr/a-z//cd;
next if ! $_ || length($_) > 8;
my %word; ++$word{$_} for split //;
for my $l (keys %word) {
next WORD if ! exists $winner{$l} || $word{$l} > 1;
}
print "$_\n";
}
__END__
ail
ails
air
airs
aisle
ale
alert
alerts
ales
alit
alp
alps
alter
alters
ape
apes
apse
apt
apter
are
ares
arise
art
arts
as
asp
aspire
aster
astir
at
ate
ear
earl
earls
ears
east
eat
eats
era
eras
erst
esprit
eta
etas
ilea
irate
ire
ires
is
isle
islet
it
its
la
lair
lairs
lap
laps
lapse
las
laser
last
late
later
lea
leap
leaps
leapt
leas
least
lei
leis
lept
lepta
lest
let
lets
liar
liars
lie
lies
lip
lips
lira
liras
lire
lisp
lisper
list
lit
lite
liter
liters
litre
litres
pa
pail
pails
pair
pairs
pal
pale
paler
pales
palest
pals
par
pare
pares
pars
parse
part
parties
parts
pas
past
paste
pastel
pastier
pat
pate
pates
pats
pea
peal
peals
pear
pearl
pearls
pears
peas
peat
peats
pelt
pelts
per
peril
perils
pert
pest
pet
petal
petals
pets
pi
piaster
piastre
pie
pier
piers
pies
pilaster
pile
piles
pirate
pirates
pis
pit
pita
pitas
pits
plait
plaits
plaster
plat
plate
plates
platies
plats
plea
pleas
pleat
pleats
pliers
plies
praise
prate
prates
pries
priest
prise
psi
rail
rails
raise
rap
rape
rapes
rapist
raps
rapt
rasp
rat
rate
rates
rats
re
real
realist
reap
reaps
relit
rep
repast
reps
res
rest
retail
retails
rial
rials
rile
riles
rip
ripe
ripest
rips
rise
rite
rites
sail
sale
salt
salter
saltier
sap
sari
sat
sate
satire
sea
seal
sear
seat
sepal
sepia
septa
sera
serial
set
silt
sip
sir
sire
sit
sitar
site
slap
slat
slate
slept
slier
slip
slit
spa
spar
spare
spat
spate
spear
spelt
spiel
spilt
spiral
spire
spirea
spit
spite
splat
split
sprat
sprite
stair
stale
staler
staple
stapler
star
stare
steal
step
stile
stir
strap
strep
stria
striae
strip
stripe
tail
tails
tale
tales
tali
tap
tape
taper
tapers
tapes
tapir
tapirs
taps
tar
tare
tares
tarp
tarps
tars
tarsi
tea
teal
teals
tear
tears
teas
ti
tie
tier
tiers
ties
tile
tiler
tilers
tiles
tip
tips
tire
tires
tis
trail
trails
traipse
trap
traps
trial
trials
tries
trip
tripe
tripes
triple
triples
trips
tsar
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