a-a a-c a-t aaa aac aad aan aar aas aat aau ac- aca acc acd acn acr acs act acu ad- ada adc add adn adr ads adt adu an- ana anc and ann anr ans ant anu ar- ara arc ard arn arr ars art aru as- asa asc asd asn asr ass ast asu at- ata atc atd atn atr ats att atu au- aua auc aud aun aur aus aut c-- caa cac cad can car cas cat cau cca ccc ccd ccn ccr ccs cct ccu cda cdc cdd cdn cdr cds cdt cdu cn- cna cnc cnd cnn cnr cns cnt cnu cra crc crd crn crr crs crt cru csa csc csd csn csr css cst csu cta ctc ctd ctn ctr cts ctt ctu cua cuc cud cun cur cus cut cuu daa dac dad dan dar das dat dau dca dcc dcd dcn dcr dcs dct dcu dda ddc ddd ddn ddr dds ddt ddu dna dnc dnd dnn dnr dns dnt dra drc drd drn drr drs drt dru dsa dsc dsd dsn dsr dss dst dsu dta dtc dtd dtn dtr dts dtt dtu dua duc dud dun dur dus dut naa nac nad nan nar nas nat nau nca ncc ncd ncn ncr ncs nct ncu nda ndc ndd ndn ndr nds ndt ndu nna nnc nnn nns nnt nnu nra nrc nrd nrn nrr nrs nrt nru nsa nsc nsd nsn nsr nss nst nsu nta ntc ntd ntn ntr nts ntt ntu nua nuc nud nun nur nus nut nuu ra- raa rac rad ran rar ras rat rau rca rcc rcd rcn rcr rcs rct rcu rda rdc rdd rdn rdr rds rdt rdu rna rnc rnd rnn rnr rns rnt rnu rra rrc rrd rrn rrr rrs rrt rru rsa rsc rsd rsn rsr rss rst rsu rta rtc rtd rtn rtr rts rtt rtu rua ruc rud run rur rus rut ruu saa sac sad san sar sas sat sau sca scc scd scn scr scs sct scu sda sdc sdd sdn sdr sds sdt sdu sna snc snd snn snr sns snt snu sr- sra src srd srn srr srs srt ss- ssa ssc ssd ssn ssr sss sst ssu sta stc std stn str sts stt stu sua suc sud sun sur sus sut suu taa tac tad tan tar tas tat tau tca tcc tcd tcn tcr tcs tct tcu tda tdc tdd tdn tdr tds tdt tdu tna tnc tnd tnn tnr tns tnt tra trc trd trn trr trs trt tru tsa tsc tsd tsn tsr tss tst tsu tta ttc ttd ttn ttr tts ttt ttu tua tuc tud tun tur tus tut tuu ua- uaa uac uad uan uar uas uat uau uca ucc ucd ucn ucr ucs uct ucu uda udc udd udn udr uds udt udu un- una unc und unn unr uns unt unu ur- ura urc urd urn urr urs urt uru usa usc usd usn usr uss ust usu uta utc utd utn utr uts utt utu uua uuc uun uur uus uut uuu