aaaa aaac aaar aaca aacc aaco aacr aact aaoo aara aarc aaro aart aata aatc aatt ac-t acaa acac acar acat acca accc acco acct acoa acor acot acr- acra acrc acro acrr acta actc acto actt aoca aora aort aotc arac arar arat arc- arca arco arct aroa aroo aror arr- arra arrc arro arrr arrt arta artc arto artr at-t ataa atac atar atat atca atcc atco atcr atoc ator atot atra atrc atro atta atto attr caaa caac caat cac- caca cacc caco cacr caor cara carc caro carr cart cat- cata catc cato catt ccaa ccac ccar ccat ccca cccc ccoc ccra ccrc ccrt cctc cctt coat coca coco coct coot cor- cora corc coro corr cort cota cotc coto cott crac crar crat crca crcc crcr croc croo cror crot crrt crtc ctca ctor ctot ctrc ctta oara ocac ocat occa occc occt ocra ocro ocrr oct- octa octo ooaa oocr oooo oora oort orac orao orar orat orca orco oro- oror orot orra orro orta ortc orto otac otar oto- otoo otor otra otro otta otto raat rac- raca racc raco ract raoc rara raro rata rato ratt rcac rccc rctc roar roat roca rocc roco roor root rora rorc roro rort rota rotc roto rotr rott rrat rrrr rtca rtcc taa- taar taat taca tacc taco tact taoa taor tara tarc taro tarr tart tata tato tatr tatt tcca tccc tctc toat toca toco tooa toor toot tora torc toro torr tort tota totc toto totr tott traa trac trao trat trca trcc troa troc troo trot trra trtc trtr tttt