a-a a-z aaa aad aao aar aas aaz ad- ada add ado adr ads adz aoa aod aoo aor aos ar- ara ard aro arr ars arz as- asa asd aso asr ass asz az- aza azd azo azs azz daa dad dao dar das daz dda ddd ddo ddr dds ddz doa dod doo dor dos doz dra drd dro drr drs drz dsa dsd dso dsr dss dsz dza dzd dzo dzr dzs oaa oad oao oar oas oda odd odo odr ods oo- ooa ood ooo oor oos or- ora ord oro orr ors orz os- osa osd oso osr oss oza ozo ozs ozz ra- raa rad rao rar ras raz rda rdd rdo rdr rds roa rod roo ror ros roz rra rrd rrr rrs rsa rsd rso rsr rss rza rzo saa sad sao sar sas saz sda sdd sdo sdr sds sdz soa sod soo sor sos soz sr- sra srd sro srr srs ss- ssa ssd sso ssr sss ssz sza szd szr zaa zad zao zar zas zaz zds zo- zoa zod zoo zor zos zro zrs zsa zsz zzr zzs zzz