shs sht shu sib sic sig sih sii sil sin sio sis sit siu slb slc slg slh sli sll sln slo sls slt slu snb snc sng sni snl snn sno sns snt snu sob soc sog soh soi sol son soo sos sot sou ss- ssb ssc ssg ssh ssi ssl ssn sso sss sst ssu stb stc stg sth sti stl stn sto sts stt stu sub suc sug suh sui sul sun suo sus sut suu tbb tbc tbg tbh tbi tbl tbn tbo tbs tbt tbu tcb tcc tcg tch tci tcl tcn tco tcs tct tcu tgb tgc tgg tgh tgi tgl tgn tgo tgs tgt tgu th- thb thc thg thh thi thl thn tho ths tht thu tib tic tig tih tii til tin tio tis tit tiu tlc tlg tlh tli tll tln tlo tls tlt tlu tnb tnc tng tnh tni tnl tnn tno tns tnt to- tob toc tog toh toi tol ton too tos tot tou tsb tsc tsg tsh tsi tsl tsn tso tss tst tsu ttb ttc ttg tth tti ttl ttn tto tts ttt ttu tub tuc tug tuh tui tul tun tuo tus tut tuu ubb ubc ubg ubh ubi ubl ubn ubo ubs ubt ubu ucb ucc ucg uch uci ucl ucn uco ucs uct ucu ugb ugc ugg ugh ugi ugl ugn ugo ugs ugt ugu uhb uhc uhh uhi uhl uho uhs uht uhu uib uic uig uii uil uin uio uis uit uiu ulb ulc ulg uli ull uln ulo uls ult ulu un- unb unc ung unh uni unl unn uno uns unt unu uob uoc uog uol uon uoo uos uot usb usc usg ush usi usl usn uso uss ust usu utb utc uth uti utl utn uto uts utt utu uuc uug uun uus uut uuu