SUBOPTICAL

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abo abs act ail ais ait alb alp als alt apo apt asp bal bap bas bat bio bis bit boa bop bos bot bus but cab cap cat cis cob col cop cos cot cub cup cut its lab lac lap las lat lib lip lis lit lob lop lot oat oba obi oca oil ops opt out pac pal pas pat pia pic pis pit piu poi pol pot psi pst pub pul pus put sab sac sal sap sat sau sib sic sip sit sob sol sop sot sou spa sub sup tab tao tap tas tau tic til tip tis top tub tui tup upo ups uta uts

abos abut acts ails aits albs alit alps also alto alts apos asci atop auto bail bait bals baps bast bats bias bios bits blat blip bloc blot boas boat boil bola bolt bops bota bots bout bust buts cabs calo capo caps cast cats caul ciao cist clap clip clop clot club coal coat cobs coil cola cols colt cops cost cots coup cubs cult cups cusp cuts iota isba labs lacs laic laps last lati lats latu libs lipa lips lisp list lits litu lobs loca loci lops lost lota loti lots loup lout lust oast oats obas obia obis obit ocas oils opal opts opus otic oust outs pacs pact pail pals past pats pial pias pica pics piso pita pits plat plot plus pois pols post pots pout ptui pubs pula puli puls puts sail salp salt sati saul scab scat scop scot scup scut sial silo silt slab slap slat slip slit slob slop slot slub slut soap soba soca soil sola soli soul soup spat spic spit spot stab stoa stob stop stub suba suit tabs tabu taco tail talc tali taos taps taus tics tils tips toil tola tolu topi tops tuba tubs tuis tups upas utas