-er a-a a-c a-t aaa aac aae aak aan aar aas aat aau ac- aca acc ace ack acn acr acs act acu aea aec aee aek aen aer aes aet aeu aka akc ake akk akn akr aks aku an- ana anc ane ank ann anr ans ant anu ar- ara arc are ark arn arr ars art aru as- asa asc ase ask asn asr ass ast asu at- ata atc ate atn atr ats att atu au- aua auc aue auk aun aur aus aut c-- caa cac cae cak can car cas cat cau cca ccc cce cck ccn ccr ccs cct ccu ce- cea cec cee cek cen cer ces cet ceu cka ckc cks ckt cn- cna cnc cne cnn cnr cns cnt cnu cra crc cre crk crn crr crs crt cru csa csc cse csk csn csr css cst csu cta ctc cte ctk ctn ctr cts ctt ctu cua cuc cue cuk cun cur cus cut cuu eaa eac eae eak ean ear eas eat eau ec- eca ecc ece eck ecn ecr ecs ect ecu eea eec eee eek een eer ees eet eka ekc eke ekr eks ekt eku en- ena enc ene enk enn enr ens ent enu era erc ere erk ern err ers ert eru es- esa esc ese esk esn esr ess est esu eta etc ete etk etn etr ets ett etu eu- eua euc eue eun eur eus eut k-t ka- kaa kac kae kak kan kar kas kat kau kca kcc kce kck kcn kcr kcs kct kcu ke- kea kec kee kek ken ker kes ket kkc kke kkk kkn kkr kks kkt kku kn- kna knc kne knk knn knr knt knu kra krc krk krn krr krs krt kru ksa ksc kse ksk ksn ksr kss kst ksu kta ktc kte ktk ktn ktr kts ktt ktu kuc kue kuk kun kur kus kut kuu naa nac nae nak nan nar nas nat nau nca ncc nce nck ncn ncr ncs nct ncu ne- nea nec nee nek nen ner nes net neu nka nkc nke nkk nkn nkr nks nkt nku nna nnc nne nnk nnn nns nnt nnu nra nrc nre nrk nrn nrr nrs nrt nru nsa nsc nse nsk nsn nsr nss nst nsu nta ntc nte ntk ntn ntr nts ntt ntu nua nuc nue nuk nun nur nus nut nuu ra- raa rac rae rak ran rar ras rat rau rca rcc rce rcn rcr rcs rct rcu re- rea rec ree rek ren rer res ret reu rkc rke rkk rks rkt rku rna rnc rnn rnr rns rnt rnu rra rrc rrk rrn rrr rrs rrt rru rsa rsc rse rsk rsn rsr rss rst rsu rta rtc rte rtk rtn rtr rts rtt rtu rua ruc rue ruk run rur rus rut ruu saa sac sae sak san sar sas sat sau sca scc sce sck scn scr scs sct scu se- sea sec see sek sen ser ses set seu sk- ska skc ske skk skr sks skt sku sna snc sne snk snn snr sns snt snu sr- sra src sre srk srn srr srs srt ss- ssa ssc sse ssk ssn ssr sss sst ssu sta stc ste stk stn str sts stt stu sua suc sue suk sun sur sus sut suu taa tac tae tak tan tar tas tat tau tca tcc tce tck tcn tcr tcs tct tcu te- tea tec tee tek ten ter tes tet teu tka tkc tke tkk tkr tks tkt tna tnc tne tnk tnn tnr tns tnt tra trc tre trk trn trr trs trt tru tsa tsc tse tsk tsn tsr tss tst tsu tta ttc tte ttk ttn ttr tts ttt ttu tua tuc tue tuk tun tur tus tut tuu ua- uaa uac uae uak uan uar uas uat uau uca ucc uce uck ucn ucr ucs uct ucu uea uec uee uen uer ues uet uka ukc uke ukk ukn ukr uku un- una unc une unk unn unr uns unt unu ur- ura urc ure urk urn urr urs urt uru usa usc use usk usn usr uss ust usu uta utc ute utk utn utr uts utt utu uua uuc uue uun uur uus uut uuu