shp shr shs sht shu sib sic sih sii sin sio sip sir sis sit siu snb snc sni snn sno snp snr sns snt snu sob soc soh soi son soo sop sor sos sot sou spb spc sph spi spn spo spp spr sps spt spu sr- srb src srh sri srn sro srp srr srs srt ss- ssb ssc ssh ssi ssn sso ssp ssr sss sst ssu stb stc sth sti stn sto stp str sts stt stu sub suc suh sui sun suo sup sur sus sut suu tbb tbc tbh tbi tbn tbo tbp tbr tbs tbt tbu tcb tcc tch tci tcn tco tcp tcr tcs tct tcu th- thb thc thh thi thn tho thp thr ths tht thu tib tic tih tii tin tio tip tir tis tit tiu tnb tnc tnh tni tnn tno tnp tnr tns tnt to- tob toc toh toi ton too top tor tos tot tou tpb tpc tph tpi tpn tpo tpp tpr tps tpt tpu trb trc trh tri trn tro trp trr trs trt tru tsb tsc tsh tsi tsn tso tsp tsr tss tst tsu ttb ttc tth tti ttn tto ttp ttr tts ttt ttu tub tuc tuh tui tun tuo tup tur tus tut tuu ubb ubc ubh ubi ubn ubo ubp ubr ubs ubt ubu ucb ucc uch uci ucn uco ucp ucr ucs uct ucu uhb uhc uhh uhi uho uhp uhr uhs uht uhu uib uic uii uin uio uip uir uis uit uiu un- unb unc unh uni unn uno unp unr uns unt unu uob uoc uon uoo uop uor uos uot up- upb upc uph upi upn upo upp upr ups upt upu ur- urb urc uri urn uro urp urr urs urt uru usb usc ush usi usn uso usp usr uss ust usu utb utc uth uti utn uto utp utr uts utt utu uuc uun uur uus uut uuu