sio sir sis sit siu slb sld slg slh sli sll slo slr sls slt slu sob sod sog soh soi sol soo sor sos sot sou sr- srb srd srg srh sri srl sro srr srs srt ss- ssb ssd ssg ssh ssi ssl sso ssr sss sst ssu stb std stg sth sti stl sto str sts stt stu sub sud sug suh sui sul suo sur sus sut suu tbb tbd tbg tbh tbi tbl tbo tbr tbs tbt tbu tdb tdd tdg tdh tdi tdl tdo tdr tds tdt tdu tgb tgg tgh tgi tgl tgo tgr tgs tgt tgu th- thb thd thg thh thi thl tho thr ths tht thu tib tid tig tih tii til tio tir tis tit tiu tld tlg tlh tli tll tlo tlr tls tlt tlu to- tob tod tog toh toi tol too tor tos tot tou trb trd trg trh tri trl tro trr trs trt tru tsb tsd tsg tsh tsi tsl tso tsr tss tst tsu ttb ttd ttg tth tti ttl tto ttr tts ttt ttu tub tud tug tuh tui tul tuo tur tus tut tuu ubb ubg ubh ubi ubl ubo ubr ubs ubt ubu udb udd udg udi udl udo udr uds udt udu ugb ugg ugh ugi ugl ugo ugr ugs ugt ugu uhb uhd uhh uhi uhl uho uhr uhs uht uhu uib uid uig uii uil uio uir uis uit uiu ulb uld ulg uli ull ulo ulr uls ult ulu uob uod uog uol uoo uor uos uot ur- urb urd urg uri url uro urr urs urt uru usb usd usg ush usi usl uso usr uss ust usu utb utd uth uti utl uto utr uts utt utu uug uur uus uut uuu