-er a-a a-c a-t aaa aac aae aak aan aar aat aau ac- aca acc ace ack acn acr act acu aea aec aee aek aen aer aet aeu aka akc ake akk akn akr aku an- ana anc ane ank ann anr ant anu ar- ara arc are ark arn arr art aru at- ata atc ate atn atr att atu au- aua auc aue auk aun aur aut c-- caa cac cae cak can car cat cau cca ccc cce cck ccn ccr cct ccu ce- cea cec cee cek cen cer cet ceu cka ckc ckt cn- cna cnc cne cnn cnr cnt cnu cra crc cre crk crn crr crt cru cta ctc cte ctk ctn ctr ctt ctu cua cuc cue cuk cun cur cut cuu eaa eac eae eak ean ear eat eau ec- eca ecc ece eck ecn ecr ect ecu eea eec eee eek een eer eet eka ekc eke ekr ekt eku en- ena enc ene enk enn enr ent enu era erc ere erk ern err ert eru eta etc ete etk etn etr ett etu eu- eua euc eue eun eur eut k-t ka- kaa kac kae kak kan kar kat kau kca kcc kce kck kcn kcr kct kcu ke- kea kec kee kek ken ker ket kkc kke kkk kkn kkr kkt kku kn- kna knc kne knk knn knr knt knu kra krc krk krn krr krt kru kta ktc kte ktk ktn ktr ktt ktu kuc kue kuk kun kur kut kuu naa nac nae nak nan nar nat nau nca ncc nce nck ncn ncr nct ncu ne- nea nec nee nek nen ner net neu nka nkc nke nkk nkn nkr nkt nku nna nnc nne nnk nnn nnt nnu nra nrc nre nrk nrn nrr nrt nru nta ntc nte ntk ntn ntr ntt ntu nua nuc nue nuk nun nur nut nuu ra- raa rac rae rak ran rar rat rau rca rcc rce rcn rcr rct rcu re- rea rec ree rek ren rer ret reu rkc rke rkk rkt rku rna rnc rnn rnr rnt rnu rra rrc rrk rrn rrr rrt rru rta rtc rte rtk rtn rtr rtt rtu rua ruc rue ruk run rur rut ruu taa tac tae tak tan tar tat tau tca tcc tce tck tcn tcr tct tcu te- tea tec tee tek ten ter tet teu tka tkc tke tkk tkr tkt tna tnc tne tnk tnn tnr tnt tra trc tre trk trn trr trt tru tta ttc tte ttk ttn ttr ttt ttu tua tuc tue tuk tun tur tut tuu ua- uaa uac uae uak uan uar uat uau uca ucc uce uck ucn ucr uct ucu uea uec uee uen uer uet uka ukc uke ukk ukn ukr uku un- una unc une unk unn unr unt unu ur- ura urc ure urk urn urr urt uru uta utc ute utk utn utr utt utu uua uuc uue uun uur uut uuu