sfi sfn sfo sfr sfs sft sfu sga sgc sgf sgg sgi sgn sgo sgr sgs sgt sgu sia sic sif sig sii sin sio sir sis sit siu sna snc snf sng sni snn sno snr sns snt snu soa soc sof sog soi son soo sor sos sot sou sr- sra src srf srg sri srn sro srr srs srt ss- ssa ssc ssf ssg ssi ssn sso ssr sss sst ssu sta stc stf stg sti stn sto str sts stt stu sua suc suf sug sui sun suo sur sus sut suu taa tac taf tag tai tan tao tar tas tat tau tca tcc tcf tcg tci tcn tco tcr tcs tct tcu tfa tfc tff tfg tfi tfn tfo tfr tfs tft tfu tga tgc tgf tgg tgi tgn tgo tgr tgs tgt tgu tia tic tif tig tii tin tio tir tis tit tiu tna tnc tnf tng tni tnn tno tnr tns tnt to- toa toc tof tog toi ton too tor tos tot tou tra trc trf trg tri trn tro trr trs trt tru tsa tsc tsf tsg tsi tsn tso tsr tss tst tsu tta ttc ttf ttg tti ttn tto ttr tts ttt ttu tua tuc tuf tug tui tun tuo tur tus tut tuu ua- uaa uac uaf uag uai uan uao uar uas uat uau uca ucc ucf ucg uci ucn uco ucr ucs uct ucu ufa ufc uff ufg ufi ufn ufo ufr ufs uft ufu uga ugc ugf ugg ugi ugn ugo ugr ugs ugt ugu uia uic uif uig uii uin uio uir uis uit uiu un- una unc unf ung uni unn uno unr uns unt unu uoa uoc uog uon uoo uor uos uot ur- ura urc urf urg uri urn uro urr urs urt uru usa usc usf usg usi usn uso usr uss ust usu uta utc utf uti utn uto utr uts utt utu uua uuc uug uun uur uus uut uuu