a-a a-c a-t aaa aac aak aan aao aar aas aat ac- aca acc ack acn aco acr acs act aka akc akk akn ako akr aks an- ana anc ank ann ano anr ans ant aoa aoc aok aon aoo aor aos aot ar- ara arc ark arn aro arr ars art as- asa asc ask asn aso asr ass ast at- ata atc atn ato atr ats att c-- caa cac cak can cao car cas cat cca ccc cck ccn cco ccr ccs cct cka ckc cko cks ckt cn- cna cnc cnn cno cnr cns cnt co- coa coc cok con coo cor cos cot cra crc crk crn cro crr crs crt csa csc csk csn cso csr css cst cta ctc ctk ctn cto ctr cts ctt k-t ka- kaa kac kak kan kao kar kas kat kca kcc kck kcn kcr kcs kct kkc kkk kkn kkr kks kkt kn- kna knc knk knn kno knr knt koa koc kok kon koo kor kos kot kra krc krk krn kro krr krs krt ksa ksc ksk ksn kso ksr kss kst kta ktc ktk ktn kto ktr kts ktt naa nac nak nan nao nar nas nat nca ncc nck ncn nco ncr ncs nct nka nkc nkk nkn nko nkr nks nkt nna nnc nnk nnn nno nns nnt no- noa noc nok non noo nor nos not nra nrc nrk nrn nro nrr nrs nrt nsa nsc nsk nsn nso nsr nss nst nta ntc ntk ntn nto ntr nts ntt oaa oac oak oan oao oar oas oat oc- oca occ ock ocn oco ocr ocs oct oka okc okk oko okr oks on- ona onc onk onn ono onr ons ont oo- ooa ooc ook oon ooo oor oos oot or- ora orc ork orn oro orr ors ort os- osa osc osk osn oso osr oss ost ot- ota otc otk otn oto otr ots ott ra- raa rac rak ran rao rar ras rat rca rcc rcn rco rcr rcs rct rkc rkk rko rks rkt rna rnc rnn rno rnr rns rnt roa roc rok ron roo ror ros rot rra rrc rrk rrn rrr rrs rrt rsa rsc rsk rsn rso rsr rss rst rta rtc rtk rtn rto rtr rts rtt saa sac sak san sao sar sas sat sca scc sck scn sco scr scs sct sk- ska skc skk sko skr sks skt sna snc snk snn sno snr sns snt soa soc sok son soo sor sos sot sr- sra src srk srn sro srr srs srt ss- ssa ssc ssk ssn sso ssr sss sst sta stc stk stn sto str sts stt taa tac tak tan tao tar tas tat tca tcc tck tcn tco tcr tcs tct tka tkc tkk tko tkr tks tkt tna tnc tnk tnn tno tnr tns tnt to- toa toc tok ton too tor tos tot tra trc trk trn tro trr trs trt tsa tsc tsk tsn tso tsr tss tst tta ttc ttk ttn tto ttr tts ttt