a-a a-c a-z aaa aac aad aao aar aaz ac- aca acc acd aco acr acz ad- ada adc add ado adr adz aoa aoc aod aoo aor ar- ara arc ard aro arr arz az- aza azd azo azz c-- caa cac cad cao car caz cca ccc ccd cco ccr ccz cda cdc cdd cdo cdr cdz co- coa coc cod coo cor coz cra crc crd cro crr crz cz- czc czd czo daa dac dad dao dar daz dca dcc dcd dco dcr dda ddc ddd ddo ddr ddz doa doc dod doo dor doz dra drc drd dro drr drz dza dzd dzo dzr oaa oac oad oao oar oc- oca occ ocd oco ocr ocz oda odc odd odo odr oo- ooa ooc ood ooo oor or- ora orc ord oro orr orz oza ozo ozz ra- raa rac rad rao rar raz rca rcc rcd rco rcr rda rdc rdd rdo rdr roa roc rod roo ror roz rra rrc rrd rrr rza rzo zaa zac zad zao zar zaz zco zo- zoa zoc zod zoo zor zro zzr zzz