rnu rpc rpd rpe rph rpi rpk rpn rpp rpr rps rpu rrc rrd rrh rri rrk rrn rrp rrr rrs rru rsc rsd rse rsh rsi rsk rsn rsp rsr rss rsu ruc rud rue ruh rui ruk run rup rur rus ruu scc scd sce sch sci sck scn scp scr scs scu sdc sdd sde sdh sdi sdk sdn sdp sdr sds sdu se- sec sed see seh sei sek sen sep ser ses seu sh- shc shd she shh shi shk shn shp shr shs shu sic sid sie sih sii sik sin sip sir sis siu sk- skc skd ske skh ski skk skp skr sks sku snc snd sne sni snk snn snp snr sns snu spc spd spe sph spi spk spn spp spr sps spu sr- src srd sre srh sri srk srn srp srr srs ss- ssc ssd sse ssh ssi ssk ssn ssp ssr sss ssu suc sud sue suh sui suk sun sup sur sus suu ucc ucd uce uch uci uck ucn ucp ucr ucs ucu udc udd ude udi udk udn udp udr uds udu uec ued uee ueh uei uen uep uer ues uhc uhd uhe uhh uhi uhp uhr uhs uhu uic uid uie uii uin uip uir uis uiu ukc uke uki ukk ukn ukp ukr uku un- unc und une unh uni unk unn unp unr uns unu up- upc upd upe uph upi upk upn upp upr ups upu ur- urc urd ure uri urk urn urp urr urs uru usc usd use ush usi usk usn usp usr uss usu uuc uue uun uur uus uuu