rsa rsb rsd rse rsg rsh rsi rsl rsm rsn rso rsr rss saa sab sad sae sag sah sai sal sam san sao sar sas sba sbb sbd sbe sbg sbh sbi sbl sbm sbn sbo sbr sbs sda sdb sdd sde sdg sdh sdi sdl sdm sdn sdo sdr sds se- sea seb sed see seg seh sei sel sem sen seo ser ses sga sgb sgd sge sgg sgh sgi sgl sgm sgn sgo sgr sgs sh- sha shb shd she shg shh shi shl shm shn sho shr shs sia sib sid sie sig sih sii sil sim sin sio sir sis sla slb sld sle slg slh sli sll slm sln slo slr sls sma smb smd sme smg smh smi sml smm smn smo smr sms sna snb snd sne sng sni snl snm snn sno snr sns soa sob sod soe sog soh soi sol som son soo sor sos sr- sra srb srd sre srg srh sri srl srm srn sro srr srs ss- ssa ssb ssd sse ssg ssh ssi ssl ssm ssn sso ssr sss