scr scs sct scu sga sgc sgg sgi sgl sgn sgo sgr sgs sgt sgu sia sic sig sii sil sin sio sir sis sit siu sla slc slg sli sll sln slo slr sls slt slu sna snc sng sni snl snn sno snr sns snt snu soa soc sog soi sol son soo sor sos sot sou sr- sra src srg sri srl srn sro srr srs srt ss- ssa ssc ssg ssi ssl ssn sso ssr sss sst ssu sta stc stg sti stl stn sto str sts stt stu sua suc sug sui sul sun suo sur sus sut suu taa tac tag tai tal tan tao tar tas tat tau tca tcc tcg tci tcl tcn tco tcr tcs tct tcu tga tgc tgg tgi tgl tgn tgo tgr tgs tgt tgu tia tic tig tii til tin tio tir tis tit tiu tla tlc tlg tli tll tln tlo tlr tls tlt tlu tna tnc tng tni tnl tnn tno tnr tns tnt to- toa toc tog toi tol ton too tor tos tot tou tra trc trg tri trl trn tro trr trs trt tru tsa tsc tsg tsi tsl tsn tso tsr tss tst tsu tta ttc ttg tti ttl ttn tto ttr tts ttt ttu tua tuc tug tui tul tun tuo tur tus tut tuu ua- uaa uac uag uai ual uan uao uar uas uat uau uca ucc ucg uci ucl ucn uco ucr ucs uct ucu uga ugc ugg ugi ugl ugn ugo ugr ugs ugt ugu uia uic uig uii uil uin uio uir uis uit uiu ula ulc ulg uli ull uln ulo ulr uls ult ulu un- una unc ung uni unl unn uno unr uns unt unu uoa uoc uog uol uon uoo uor uos uot ur- ura urc urg uri url urn uro urr urs urt uru usa usc usg usi usl usn uso usr uss ust usu uta utc uti utl utn uto utr uts utt utu uua uuc uug uun uur uus uut uuu