shh shi shl sho shr shs sht shu sib sic sie sih sii sil sio sir sis sit siu slb slc sle slh sli sll slo slr sls slt slu sob soc soe soh soi sol soo sor sos sot sou sr- srb src sre srh sri srl sro srr srs srt ss- ssb ssc sse ssh ssi ssl sso ssr sss sst ssu stb stc ste sth sti stl sto str sts stt stu sub suc sue suh sui sul suo sur sus sut suu tbb tbc tbe tbh tbi tbl tbo tbr tbs tbt tbu tcb tcc tce tch tci tcl tco tcr tcs tct tcu te- teb tec tee teh tei tel teo ter tes tet teu th- thb thc the thh thi thl tho thr ths tht thu tib tic tie tih tii til tio tir tis tit tiu tlc tle tlh tli tll tlo tlr tls tlt tlu to- tob toc toe toh toi tol too tor tos tot tou trb trc tre trh tri trl tro trr trs trt tru tsb tsc tse tsh tsi tsl tso tsr tss tst tsu ttb ttc tte tth tti ttl tto ttr tts ttt ttu tub tuc tue tuh tui tul tuo tur tus tut tuu ubb ubc ube ubh ubi ubl ubo ubr ubs ubt ubu ucb ucc uce uch uci ucl uco ucr ucs uct ucu ueb uec uee ueh uei uel uer ues uet uhb uhc uhe uhh uhi uhl uho uhr uhs uht uhu uib uic uie uii uil uio uir uis uit uiu ulb ulc ule uli ull ulo ulr uls ult ulu uob uoc uoe uol uoo uor uos uot ur- urb urc ure uri url uro urr urs urt uru usb usc use ush usi usl uso usr uss ust usu utb utc ute uth uti utl uto utr uts utt utu uuc uue uur uus uut uuu