slt slu sna snc sne snf sni snl snn sno snp snr sns snt snu soa soc soe sof soi sol son soo sop soq sor sos sot sou spa spc spe spf spi spl spn spo spp spq spr sps spt spu sqa sqi sql sqn sqq sqr sqs sr- sra src sre srf sri srl srn sro srp srq srr srs srt ss- ssa ssc sse ssf ssi ssl ssn sso ssp ssq ssr sss sst ssu sta stc ste stf sti stl stn sto stp stq str sts stt stu sua suc sue suf sui sul sun suo sup suq sur sus sut suu taa tac tae taf tai tal tan tao tap taq tar tas tat tau tca tcc tce tcf tci tcl tcn tco tcp tcr tcs tct tcu te- tea tec tee tef tei tel ten teo tep teq ter tes tet teu tfa tfc tfe tff tfi tfl tfn tfo tfp tfr tfs tft tfu tia tic tie tif tii til tin tio tip tir tis tit tiu tla tlc tle tlf tli tll tln tlo tlp tlr tls tlt tlu tna tnc tne tnf tni tnl tnn tno tnp tnq tnr tns tnt to- toa toc toe tof toi tol ton too top toq tor tos tot tou tpa tpc tpe tpf tpi tpl tpn tpo tpp tpq tpr tps tpt tpu tqo tra trc tre trf tri trl trn tro trp trq trr trs trt tru tsa tsc tse tsf tsi tsl tsn tso tsp tsq tsr tss tst tsu tta ttc tte ttf tti ttl ttn tto ttp ttr tts ttt ttu tua tuc tue tuf tui tul tun tuo tup tur tus tut tuu ua- uaa uac uae uaf uai ual uan uao uap uaq uar uas uat uau uca ucc uce ucf uci ucl ucn uco ucp ucr ucs uct ucu uea uec uee uef uei uel uen uep uer ues uet ufa ufc ufe uff ufi ufl ufn ufo ufp ufr ufs uft ufu uia uic uie uif uii uil uin uio uip uiq uir uis uit uiu ula ulc ule ulf uli ull uln ulo ulp ulr uls ult ulu un- una unc une unf uni unl unn uno unp unq unr uns unt unu uoa uoc uoe uol uon uoo uop uor uos uot up- upa upc upe upf upi upn upo upp upr ups upt upu ur- ura urc ure urf uri url urn uro urp urr urs urt uru usa usc use usf usi usl usn uso usp usr uss ust usu uta utc ute utf uti utl utn uto utp utr uts utt utu uua uuc uue uun uur uus uut uuu