ror ros roz rra rrb rrg rri rrm rrn rrr rrs rsa rsb rse rsg rsi rsm rsn rso rsr rss rza rzb rze rzm rzo saa sab sae sag sai sam san sao sar sas saz sba sbb sbe sbg sbi sbm sbn sbo sbr sbs se- sea seb see seg sei sem sen seo ser ses sez sga sgb sge sgg sgi sgm sgn sgo sgr sgs sia sib sie sig sii sim sin sio sir sis sma smb sme smg smi smm smn smo smr sms smz sna snb sne sng sni snm snn sno snr sns soa sob soe sog soi som son soo sor sos soz sr- sra srb sre srg sri srm srn sro srr srs ss- ssa ssb sse ssg ssi ssm ssn sso ssr sss ssz sza sze szi szr z-g zaa zab zag zai zam zan zao zar zas zaz zbb zbm zbr zbs zea zeb zee zem zen zeo zer zes zez zgb zgg zgi zgs zia zib zie zig zim zin zio zir zis ziz zma zmb zmm zms zne znn zno zns zo- zoa zob zoe zog zoi zom zon zoo zor zos zro zrs zsa zse zsg zsi zsm zsz zzr zzs zzz