-er a-a a-c a-t aaa aac aae aak aar aat aau ac- aca acc ace ack acr act acu aea aec aee aek aer aet aeu aka akc ake akk akr aku ar- ara arc are ark arr art aru at- ata atc ate atr att atu au- aua auc aue auk aur aut c-- caa cac cae cak car cat cau cca ccc cce cck ccr cct ccu ce- cea cec cee cek cer cet ceu cka ckc ckt cra crc cre crk crr crt cru cta ctc cte ctk ctr ctt ctu cua cuc cue cuk cur cut cuu eaa eac eae eak ear eat eau ec- eca ecc ece eck ecr ect ecu eea eec eee eek eer eet eka ekc eke ekr ekt eku era erc ere erk err ert eru eta etc ete etk etr ett etu eu- eua euc eue eur eut k-t ka- kaa kac kae kak kar kat kau kca kcc kce kck kcr kct kcu ke- kea kec kee kek ker ket kkc kke kkk kkr kkt kku kra krc krk krr krt kru kta ktc kte ktk ktr ktt ktu kuc kue kuk kur kut kuu ra- raa rac rae rak rar rat rau rca rcc rce rcr rct rcu re- rea rec ree rek rer ret reu rkc rke rkk rkt rku rra rrc rrk rrr rrt rru rta rtc rte rtk rtr rtt rtu rua ruc rue ruk rur rut ruu taa tac tae tak tar tat tau tca tcc tce tck tcr tct tcu te- tea tec tee tek ter tet teu tka tkc tke tkk tkr tkt tra trc tre trk trr trt tru tta ttc tte ttk ttr ttt ttu tua tuc tue tuk tur tut tuu ua- uaa uac uae uak uar uat uau uca ucc uce uck ucr uct ucu uea uec uee uer uet uka ukc uke ukk ukr uku ur- ura urc ure urk urr urt uru uta utc ute utk utr utt utu uua uuc uue uur uut uuu