rrk rrn rrp rrr rrs rru rsc rse rsf rsh rsi rsk rsn rsp rsr rss rsu ruc rue ruf ruh rui ruk run rup rur rus ruu scc sce scf sch sci sck scn scp scr scs scu se- sec see sef seh sei sek sen sep ser ses seu sfc sfe sff sfh sfi sfk sfn sfp sfr sfs sfu sh- shc she shf shh shi shk shn shp shr shs shu sic sie sif sih sii sik sin sip sir sis siu sk- skc ske skf skh ski skk skp skr sks sku snc sne snf sni snk snn snp snr sns snu spc spe spf sph spi spk spn spp spr sps spu sr- src sre srf srh sri srk srn srp srr srs ss- ssc sse ssf ssh ssi ssk ssn ssp ssr sss ssu suc sue suf suh sui suk sun sup sur sus suu ucc uce ucf uch uci uck ucn ucp ucr ucs ucu uec uee uef ueh uei uen uep uer ues ufc ufe uff ufh ufi ufn ufp ufr ufs ufu uhc uhe uhf uhh uhi uhp uhr uhs uhu uic uie uif uii uin uip uir uis uiu ukc uke ukf uki ukk ukn ukp ukr uku un- unc une unf unh uni unk unn unp unr uns unu up- upc upe upf uph upi upk upn upp upr ups upu ur- urc ure urf uri urk urn urp urr urs uru usc use usf ush usi usk usn usp usr uss usu uuc uue uun uur uus uuu