a-a a-c a-t aaa aac aad aak aan aar aas aat ac- aca acc acd ack acn acr acs act ad- ada adc add adk adn adr ads adt aka akc akd akk akn akr aks an- ana anc and ank ann anr ans ant ar- ara arc ard ark arn arr ars art as- asa asc asd ask asn asr ass ast at- ata atc atd atn atr ats att c-- caa cac cad cak can car cas cat cca ccc ccd cck ccn ccr ccs cct cda cdc cdd cdk cdn cdr cds cdt cka ckc ckd cks ckt cn- cna cnc cnd cnn cnr cns cnt cra crc crd crk crn crr crs crt csa csc csd csk csn csr css cst cta ctc ctd ctk ctn ctr cts ctt daa dac dad dak dan dar das dat dca dcc dcd dck dcn dcr dcs dct dda ddc ddd ddk ddn ddr dds ddt dka dkc dkk dkr dks dkt dna dnc dnd dnk dnn dnr dns dnt dra drc drd drk drn drr drs drt dsa dsc dsd dsk dsn dsr dss dst dta dtc dtd dtk dtn dtr dts dtt k-t ka- kaa kac kad kak kan kar kas kat kca kcc kcd kck kcn kcr kcs kct kda kdc kdk kdr kds kdt kkc kkk kkn kkr kks kkt kn- kna knc knd knk knn knr knt kra krc krd krk krn krr krs krt ksa ksc ksd ksk ksn ksr kss kst kta ktc ktk ktn ktr kts ktt naa nac nad nak nan nar nas nat nca ncc ncd nck ncn ncr ncs nct nda ndc ndd ndk ndn ndr nds ndt nka nkc nkk nkn nkr nks nkt nna nnc nnk nnn nns nnt nra nrc nrd nrk nrn nrr nrs nrt nsa nsc nsd nsk nsn nsr nss nst nta ntc ntd ntk ntn ntr nts ntt ra- raa rac rad rak ran rar ras rat rca rcc rcd rcn rcr rcs rct rda rdc rdd rdn rdr rds rdt rkc rkk rks rkt rna rnc rnd rnn rnr rns rnt rra rrc rrd rrk rrn rrr rrs rrt rsa rsc rsd rsk rsn rsr rss rst rta rtc rtd rtk rtn rtr rts rtt saa sac sad sak san sar sas sat sca scc scd sck scn scr scs sct sda sdc sdd sdk sdn sdr sds sdt sk- ska skc skd skk skr sks skt sna snc snd snk snn snr sns snt sr- sra src srd srk srn srr srs srt ss- ssa ssc ssd ssk ssn ssr sss sst sta stc std stk stn str sts stt taa tac tad tak tan tar tas tat tca tcc tcd tck tcn tcr tcs tct tda tdc tdd tdk tdn tdr tds tdt tka tkc tkk tkr tks tkt tna tnc tnd tnk tnn tnr tns tnt tra trc trd trk trn trr trs trt tsa tsc tsd tsk tsn tsr tss tst tta ttc ttd ttk ttn ttr tts ttt