a-a a-c a-t aaa aac aao aar aat aau ac- aca acc aco acr act acu aoa aoc aoo aor aot aou ar- ara arc aro arr art aru at- ata atc ato atr att atu au- aua auc auo aur aut c-- caa cac cao car cat cau cca ccc cco ccr cct ccu co- coa coc coo cor cot cou cra crc cro crr crt cru cta ctc cto ctr ctt ctu cua cuc cuo cur cut cuu oaa oac oao oar oat oau oc- oca occ oco ocr oct ocu oo- ooa ooc ooo oor oot or- ora orc oro orr ort oru ot- ota otc oto otr ott otu ou- oua ouc ouo our out ra- raa rac rao rar rat rau rca rcc rco rcr rct rcu roa roc roo ror rot rou rra rrc rrr rrt rru rta rtc rto rtr rtt rtu rua ruc ruo rur rut ruu taa tac tao tar tat tau tca tcc tco tcr tct tcu to- toa toc too tor tot tou tra trc tro trr trt tru tta ttc tto ttr ttt ttu tua tuc tuo tur tut tuu ua- uaa uac uao uar uat uau uca ucc uco ucr uct ucu uoa uoc uoo uor uot ur- ura urc uro urr urt uru uta utc uto utr utt utu uua uuc uur uut uuu