sio sip sir sis sit siu snc snf sni snn sno snp snr sns snt snu soc sof soh soi son soo sop sor sos sot sou spc spf sph spi spn spo spp spr sps spt spu sr- src srf srh sri srn sro srp srr srs srt ss- ssc ssf ssh ssi ssn sso ssp ssr sss sst ssu stc stf sth sti stn sto stp str sts stt stu suc suf suh sui sun suo sup sur sus sut suu tcc tcf tch tci tcn tco tcp tcr tcs tct tcu tfc tff tfh tfi tfn tfo tfp tfr tfs tft tfu th- thc thf thh thi thn tho thp thr ths tht thu tic tif tih tii tin tio tip tir tis tit tiu tnc tnf tnh tni tnn tno tnp tnr tns tnt to- toc tof toh toi ton too top tor tos tot tou tpc tpf tph tpi tpn tpo tpp tpr tps tpt tpu trc trf trh tri trn tro trp trr trs trt tru tsc tsf tsh tsi tsn tso tsp tsr tss tst tsu ttc ttf tth tti ttn tto ttp ttr tts ttt ttu tuc tuf tuh tui tun tuo tup tur tus tut tuu ucc ucf uch uci ucn uco ucp ucr ucs uct ucu ufc uff ufh ufi ufn ufo ufp ufr ufs uft ufu uhc uhf uhh uhi uho uhp uhr uhs uht uhu uic uif uii uin uio uip uir uis uit uiu un- unc unf unh uni unn uno unp unr uns unt unu uoc uon uoo uop uor uos uot up- upc upf uph upi upn upo upp upr ups upt upu ur- urc urf uri urn uro urp urr urs urt uru usc usf ush usi usn uso usp usr uss ust usu utc utf uth uti utn uto utp utr uts utt utu uuc uun uur uus uut uuu