a-wa aaaa aaac aaca aacc aaco aact aaoo aaow aata aatc aatt aatw aawt aaww ac-t acaa acac acat acca accc acco acct acoa acot acow acta actc acto actt acwa acww aoca aotc at-t ataa atac atat atca atcc atco atoc atot atta atto atwa atwo atwt awac awoo awow awwa caaa caac caat cac- caca cacc caco cacw cat- cata catc cato catt catw ccaa ccac ccat ccca cccc ccoc ccow cctc cctt coat coca coco coct coot cota cotc coto cott cotw cowt ctca ctot ctta cttw cwac cwot ocac ocat occa occc occt oct- octa octo ooaa oooo ootw otac oto- otoo otow otta otto otwo owow owt- owtt owwa taa- taat taca tacc taco tact taoa tata tato tatt tawa tawo tawt taww tcca tccc tctc toat toaw toca toco tooa toot tota totc toto tott towa tttt twat two- twoa twoc twoo twot waaa waac waao waat waaw waca wacc waco wact waoc waoo waow wata watc wato watt watw wawa wawc wawo wawt wcao wcat wcca wccc wcco wcct wccw wcoa wcoc wcoo wcot wcta wctc wcto wctt wctw wcwa wcwc woaa woat woca wocc woco wooc woot woow wotc wott wotw wowc wowo wowt woww wtac wtaw wtca wtcc wtco wtct wtcw wtoc wtot wtow wtta wttc wtto wttt wttw wtwa wtwo wtwt wtww wwac wwca wwco wwct wwcw wwot wwow wwta wwtc wwtw wwwa wwwc wwww