qtc qtd qti qtq qtr qts qu- qua qud que qui qur qus qut ra- raa rac rad rae rag rai ran raq rar ras rat rau rca rcc rcd rce rcg rci rcn rcr rcs rct rcu rda rdc rdd rde rdg rdi rdn rdr rds rdt rdu re- rea rec red ree reg rei ren req rer res ret reu rga rgc rgd rge rgg rgi rgn rgr rgs rgt ria ric rid rie rig rii rin riq rir ris rit rna rnc rnd rng rni rnn rnr rns rnt rnu rqc rqn rqs rra rrc rrd rrg rri rrn rrq rrr rrs rrt rru rsa rsc rsd rse rsg rsi rsn rsq rsr rss rst rsu rta rtc rtd rte rtg rti rtn rtq rtr rts rtt rtu rua ruc rud rue rug rui run rur rus rut ruu saa sac sad sae sag sai san saq sar sas sat sau sca scc scd sce scg sci scn scr scs sct scu sda sdc sdd sde sdg sdi sdn sdq sdr sds sdt sdu se- sea sec sed see seg sei sen seq ser ses set seu sga sgc sgd sge sgg sgi sgn sgr sgs sgt sgu sia sic sid sie sig sii sin siq sir sis sit siu sna snc snd sne sng sni snn snr sns snt snu sqa sqd sqi sqn sqq sqr sqs sr- sra src srd sre srg sri srn srq srr srs srt ss- ssa ssc ssd sse ssg ssi ssn ssq ssr sss sst ssu sta stc std ste stg sti stn stq str sts stt stu sua suc sud sue sug sui sun suq sur sus sut suu taa tac tad tae tag tai tan taq tar tas tat tau tca tcc tcd tce tcg tci tcn tcr tcs tct tcu tda tdc tdd tde tdg tdi tdn tdr tds tdt tdu te- tea tec ted tee teg tei ten teq ter tes tet teu tga tgc tge tgg tgi tgn tgr tgs tgt tgu tia tic tid tie tig tii tin tir tis tit tiu tna tnc tnd tne tng tni tnn tnq tnr tns tnt tra trc trd tre trg tri trn trq trr trs trt tru tsa tsc tsd tse tsg tsi tsn tsq tsr tss tst tsu tta ttc ttd tte ttg tti ttn ttr tts ttt ttu tua tuc tud tue tug tui tun tur tus tut tuu ua- uaa uac uad uae uag uai uan uaq uar uas uat uau uca ucc ucd uce ucg uci ucn ucr ucs uct ucu uda udc udd ude udg udi udn udr uds udt udu uea uec ued uee ueg uei uen uer ues uet uga ugc uge ugg ugi ugn ugr ugs ugt ugu uia uic uid uie uig uii uin uiq uir uis uit uiu un- una unc und une ung uni unn unq unr uns unt unu ur- ura urc urd ure urg uri urn urr urs urt uru usa usc usd use usg usi usn usr uss ust usu uta utc utd ute uti utn utr uts utt utu uua uuc uue uug uun uur uus uut uuu