rke rkf rkk rks rkv rna rnb rnc rni rnn rnr rns rnv rra rrb rrc rrf rri rrk rrn rrr rrs rsa rsb rsc rse rsf rsi rsk rsn rsr rss rsv rva rvb rvc rve rvf rvi rvn rvr rvs rvv saa sab sac sae saf sai sak san sar sas sav sba sbb sbc sbe sbf sbi sbk sbn sbr sbs sbv sca scb scc sce scf sci sck scn scr scs scv se- sea seb sec see sef sei sek sen ser ses sev sfa sfb sfc sfe sff sfi sfk sfn sfr sfs sfv sia sib sic sie sif sii sik sin sir sis siv sk- ska skb skc ske skf ski skk skr sks sna snb snc sne snf sni snk snn snr sns snv sr- sra srb src sre srf sri srk srn srr srs srv ss- ssa ssb ssc sse ssf ssi ssk ssn ssr sss ssv sva svb svc sve svf svi svk svn svr svs svv v-a v-e vaa vab vac vae vai vak van var vas vav vba vbc vbi vbk vbr vbs vbv vca vcc vce vcf vci vcn vcr vcs vea veb vec vee vef vei vek ven ver ves vfa vfb vfc vff vfi vfn vfr vfs vfv vi- via vib vic vie vif vii vik vin vir vis viv vka vkb vn- vna vnf vni vnr vns vnv vra vrb vrc vre vrf vri vrk vrn vrr vrs vsa vsb vsc vse vsf vsi vsk vsn vsr vss vsv vva vvb vvc vvi vvr vvs vvv