-er a-a a-c a-t aaa aac aae aak aan aao aar aat aau ac- aca acc ace ack acn aco acr act acu aea aec aee aek aen aeo aer aet aeu aka akc ake akk akn ako akr aku an- ana anc ane ank ann ano anr ant anu aoa aoc aoe aok aon aoo aor aot aou ar- ara arc are ark arn aro arr art aru at- ata atc ate atn ato atr att atu au- aua auc aue auk aun auo aur aut c-- caa cac cae cak can cao car cat cau cca ccc cce cck ccn cco ccr cct ccu ce- cea cec cee cek cen ceo cer cet ceu cka ckc cko ckt cn- cna cnc cne cnn cno cnr cnt cnu co- coa coc coe cok con coo cor cot cou cra crc cre crk crn cro crr crt cru cta ctc cte ctk ctn cto ctr ctt ctu cua cuc cue cuk cun cuo cur cut cuu eaa eac eae eak ean eao ear eat eau ec- eca ecc ece eck ecn eco ecr ect ecu eea eec eee eek een eeo eer eet eka ekc eke eko ekr ekt eku en- ena enc ene enk enn eno enr ent enu eo- eoa eoc eoe eok eon eoo eor eot eou era erc ere erk ern ero err ert eru eta etc ete etk etn eto etr ett etu eu- eua euc eue eun eur eut k-t ka- kaa kac kae kak kan kao kar kat kau kca kcc kce kck kcn kcr kct kcu ke- kea kec kee kek ken keo ker ket kkc kke kkk kkn kkr kkt kku kn- kna knc kne knk knn kno knr knt knu koa koc koe kok kon koo kor kot kou kra krc krk krn kro krr krt kru kta ktc kte ktk ktn kto ktr ktt ktu kuc kue kuk kun kur kut kuu naa nac nae nak nan nao nar nat nau nca ncc nce nck ncn nco ncr nct ncu ne- nea nec nee nek nen neo ner net neu nka nkc nke nkk nkn nko nkr nkt nku nna nnc nne nnk nnn nno nnt nnu no- noa noc noe nok non noo nor not nou nra nrc nre nrk nrn nro nrr nrt nru nta ntc nte ntk ntn nto ntr ntt ntu nua nuc nue nuk nun nuo nur nut nuu oaa oac oae oak oan oao oar oat oau oc- oca occ ock ocn oco ocr oct ocu oea oec oee oen oeo oer oet oka okc oke okk oko okr oku on- ona onc one onk onn ono onr ont onu oo- ooa ooc ook oon ooo oor oot or- ora orc ore ork orn oro orr ort oru ot- ota otc ote otk otn oto otr ott otu ou- oua ouc oue ouk oun ouo our out ra- raa rac rae rak ran rao rar rat rau rca rcc rce rcn rco rcr rct rcu re- rea rec ree rek ren reo rer ret reu rkc rke rkk rko rkt rku rna rnc rnn rno rnr rnt rnu roa roc roe rok ron roo ror rot rou rra rrc rrk rrn rrr rrt rru rta rtc rte rtk rtn rto rtr rtt rtu rua ruc rue ruk run ruo rur rut ruu taa tac tae tak tan tao tar tat tau tca tcc tce tck tcn tco tcr tct tcu te- tea tec tee tek ten teo ter tet teu tka tkc tke tkk tko tkr tkt tna tnc tne tnk tnn tno tnr tnt to- toa toc toe tok ton too tor tot tou tra trc tre trk trn tro trr trt tru tta ttc tte ttk ttn tto ttr ttt ttu tua tuc tue tuk tun tuo tur tut tuu ua- uaa uac uae uak uan uao uar uat uau uca ucc uce uck ucn uco ucr uct ucu uea uec uee uen uer uet uka ukc uke ukk ukn ukr uku un- una unc une unk unn uno unr unt unu uoa uoc uoe uok uon uoo uor uot ur- ura urc ure urk urn uro urr urt uru uta utc ute utk utn uto utr utt utu uua uuc uue uun uur uut uuu