scn sco scr scs sct scu sda sdc sdd sdg sdi sdn sdo sdr sds sdt sdu sga sgc sgd sgg sgi sgn sgo sgr sgs sgt sgu sia sic sid sig sii sin sio sir sis sit siu sna snc snd sng sni snn sno snr sns snt snu soa soc sod sog soi son soo sor sos sot sou sr- sra src srd srg sri srn sro srr srs srt ss- ssa ssc ssd ssg ssi ssn sso ssr sss sst ssu sta stc std stg sti stn sto str sts stt stu sua suc sud sug sui sun suo sur sus sut suu taa tac tad tag tai tan tao tar tas tat tau tca tcc tcd tcg tci tcn tco tcr tcs tct tcu tda tdc tdd tdg tdi tdn tdo tdr tds tdt tdu tga tgc tgg tgi tgn tgo tgr tgs tgt tgu tia tic tid tig tii tin tio tir tis tit tiu tna tnc tnd tng tni tnn tno tnr tns tnt to- toa toc tod tog toi ton too tor tos tot tou tra trc trd trg tri trn tro trr trs trt tru tsa tsc tsd tsg tsi tsn tso tsr tss tst tsu tta ttc ttd ttg tti ttn tto ttr tts ttt ttu tua tuc tud tug tui tun tuo tur tus tut tuu ua- uaa uac uad uag uai uan uao uar uas uat uau uca ucc ucd ucg uci ucn uco ucr ucs uct ucu uda udc udd udg udi udn udo udr uds udt udu uga ugc ugg ugi ugn ugo ugr ugs ugt ugu uia uic uid uig uii uin uio uir uis uit uiu un- una unc und ung uni unn uno unr uns unt unu uoa uoc uod uog uon uoo uor uos uot ur- ura urc urd urg uri urn uro urr urs urt uru usa usc usd usg usi usn uso usr uss ust usu uta utc utd uti utn uto utr uts utt utu uua uuc uug uun uur uus uut uuu