see sef seg sei sen ser ses set seu sfa sfc sfe sff sfg sfi sfn sfr sfs sft sfu sga sgc sge sgf sgg sgi sgn sgr sgs sgt sgu sia sic sie sif sig sii sin sir sis sit siu sna snc sne snf sng sni snn snr sns snt snu sr- sra src sre srf srg sri srn srr srs srt ss- ssa ssc sse ssf ssg ssi ssn ssr sss sst ssu sta stc ste stf stg sti stn str sts stt stu sua suc sue suf sug sui sun sur sus sut suu taa tac tae taf tag tai tan tar tas tat tau tca tcc tce tcf tcg tci tcn tcr tcs tct tcu te- tea tec tee tef teg tei ten ter tes tet teu tfa tfc tfe tff tfg tfi tfn tfr tfs tft tfu tga tgc tge tgf tgg tgi tgn tgr tgs tgt tgu tia tic tie tif tig tii tin tir tis tit tiu tna tnc tne tnf tng tni tnn tnr tns tnt tra trc tre trf trg tri trn trr trs trt tru tsa tsc tse tsf tsg tsi tsn tsr tss tst tsu tta ttc tte ttf ttg tti ttn ttr tts ttt ttu tua tuc tue tuf tug tui tun tur tus tut tuu ua- uaa uac uae uaf uag uai uan uar uas uat uau uca ucc uce ucf ucg uci ucn ucr ucs uct ucu uea uec uee uef ueg uei uen uer ues uet ufa ufc ufe uff ufg ufi ufn ufr ufs uft ufu uga ugc uge ugf ugg ugi ugn ugr ugs ugt ugu uia uic uie uif uig uii uin uir uis uit uiu un- una unc une unf ung uni unn unr uns unt unu ur- ura urc ure urf urg uri urn urr urs urt uru usa usc use usf usg usi usn usr uss ust usu uta utc ute utf uti utn utr uts utt utu uua uuc uue uug uun uur uus uut uuu