rrd rrg rri rrl rrn rrr rrs rsa rsc rsd rse rsg rsi rsl rsn rsr rss rza rze saa sac sad sae sag sai sal san sar sas saz sca scc scd sce scg sci scl scn scr scs sda sdc sdd sde sdg sdi sdl sdn sdr sds sdz se- sea sec sed see seg sei sel sen ser ses sez sga sgc sgd sge sgg sgi sgl sgn sgr sgs sia sic sid sie sig sii sil sin sir sis sla slc sld sle slg sli sll sln slr sls sna snc snd sne sng sni snl snn snr sns sr- sra src srd sre srg sri srl srn srr srs ss- ssa ssc ssd sse ssg ssi ssl ssn ssr sss ssz sza szd sze szi szl szr z-g zaa zac zad zag zai zan zar zas zaz zce zcl zcs zds zea zec zed zee zel zen zer zes zez zgg zgi zgs zia zid zie zig zil zin zir zis ziz zla zlr znc znd zne znn zns zrl zrs zsa zse zsg zsi zsl zsz zzr zzs zzz