see sef seg sei seo ser ses set seu sfa sfc sfe sff sfg sfi sfo sfr sfs sft sfu sga sgc sge sgf sgg sgi sgo sgr sgs sgt sgu sia sic sie sif sig sii sio sir sis sit siu soa soc soe sof sog soi soo sor sos sot sou sr- sra src sre srf srg sri sro srr srs srt ss- ssa ssc sse ssf ssg ssi sso ssr sss sst ssu sta stc ste stf stg sti sto str sts stt stu sua suc sue suf sug sui suo sur sus sut suu taa tac tae taf tag tai tao tar tas tat tau tca tcc tce tcf tcg tci tco tcr tcs tct tcu te- tea tec tee tef teg tei teo ter tes tet teu tfa tfc tfe tff tfg tfi tfo tfr tfs tft tfu tga tgc tge tgf tgg tgi tgo tgr tgs tgt tgu tia tic tie tif tig tii tio tir tis tit tiu to- toa toc toe tof tog toi too tor tos tot tou tra trc tre trf trg tri tro trr trs trt tru tsa tsc tse tsf tsg tsi tso tsr tss tst tsu tta ttc tte ttf ttg tti tto ttr tts ttt ttu tua tuc tue tuf tug tui tuo tur tus tut tuu ua- uaa uac uae uaf uag uai uao uar uas uat uau uca ucc uce ucf ucg uci uco ucr ucs uct ucu uea uec uee uef ueg uei uer ues uet ufa ufc ufe uff ufg ufi ufo ufr ufs uft ufu uga ugc uge ugf ugg ugi ugo ugr ugs ugt ugu uia uic uie uif uig uii uio uir uis uit uiu uoa uoc uoe uog uoo uor uos uot ur- ura urc ure urf urg uri uro urr urs urt uru usa usc use usf usg usi uso usr uss ust usu uta utc ute utf uti uto utr uts utt utu uua uuc uue uug uur uus uut uuu