a-a a-c a-z aaa aac aah aao aar aaz ac- aca acc ach aco acr acz aha ahc ahh aho ahr ahz aoa aoc aoh aoo aor ar- ara arc arh aro arr arz az- aza azo azz c-- caa cac cah cao car caz cca ccc cch cco ccr ccz ch- cha chc chh cho chr chz co- coa coc coh coo cor coz cra crc crh cro crr crz cz- czc czo haa hac hah hao har haz hca hcc hch hco hcr hha hhc hhh hho hhr hhz hoa hoc hoh hoo hor hr- hra hrc hrh hro hrr hrz hzo oaa oac oah oao oar oc- oca occ och oco ocr ocz oha ohc ohh oho ohr oo- ooa ooc ooh ooo oor or- ora orc orh oro orr orz oza ozo ozz ra- raa rac rah rao rar raz rca rcc rch rco rcr rh- rha rhc rhh rho rhr roa roc roh roo ror roz rra rrc rrh rrr rza rzo zaa zac zah zao zar zaz zco zha zhc zho zhr zo- zoa zoc zoo zor zrh zro zzr zzz