-er a-a a-c a-t aaa aac aae aak aar aas aat aau ac- aca acc ace ack acr acs act acu aea aec aee aek aer aes aet aeu aka akc ake akk akr aks aku ar- ara arc are ark arr ars art aru as- asa asc ase ask asr ass ast asu at- ata atc ate atr ats att atu au- aua auc aue auk aur aus aut c-- caa cac cae cak car cas cat cau cca ccc cce cck ccr ccs cct ccu ce- cea cec cee cek cer ces cet ceu cka ckc cks ckt cra crc cre crk crr crs crt cru csa csc cse csk csr css cst csu cta ctc cte ctk ctr cts ctt ctu cua cuc cue cuk cur cus cut cuu eaa eac eae eak ear eas eat eau ec- eca ecc ece eck ecr ecs ect ecu eea eec eee eek eer ees eet eka ekc eke ekr eks ekt eku era erc ere erk err ers ert eru es- esa esc ese esk esr ess est esu eta etc ete etk etr ets ett etu eu- eua euc eue eur eus eut k-t ka- kaa kac kae kak kar kas kat kau kca kcc kce kck kcr kcs kct kcu ke- kea kec kee kek ker kes ket kkc kke kkk kkr kks kkt kku kra krc krk krr krs krt kru ksa ksc kse ksk ksr kss kst ksu kta ktc kte ktk ktr kts ktt ktu kuc kue kuk kur kus kut kuu ra- raa rac rae rak rar ras rat rau rca rcc rce rcr rcs rct rcu re- rea rec ree rek rer res ret reu rkc rke rkk rks rkt rku rra rrc rrk rrr rrs rrt rru rsa rsc rse rsk rsr rss rst rsu rta rtc rte rtk rtr rts rtt rtu rua ruc rue ruk rur rus rut ruu saa sac sae sak sar sas sat sau sca scc sce sck scr scs sct scu se- sea sec see sek ser ses set seu sk- ska skc ske skk skr sks skt sku sr- sra src sre srk srr srs srt ss- ssa ssc sse ssk ssr sss sst ssu sta stc ste stk str sts stt stu sua suc sue suk sur sus sut suu taa tac tae tak tar tas tat tau tca tcc tce tck tcr tcs tct tcu te- tea tec tee tek ter tes tet teu tka tkc tke tkk tkr tks tkt tra trc tre trk trr trs trt tru tsa tsc tse tsk tsr tss tst tsu tta ttc tte ttk ttr tts ttt ttu tua tuc tue tuk tur tus tut tuu ua- uaa uac uae uak uar uas uat uau uca ucc uce uck ucr ucs uct ucu uea uec uee uer ues uet uka ukc uke ukk ukr uku ur- ura urc ure urk urr urs urt uru usa usc use usk usr uss ust usu uta utc ute utk utr uts utt utu uua uuc uue uur uus uut uuu