a-a a-c a-z aaa aac aah aak aao aar aaz ac- aca acc ach ack aco acr acz aha ahc ahh ahk aho ahr ahz aka akc akh akk ako akr aoa aoc aoh aok aoo aor ar- ara arc arh ark aro arr arz az- aza azo azz c-- caa cac cah cak cao car caz cca ccc cch cck cco ccr ccz ch- cha chc chh chk cho chr chz cka ckc ckh cko co- coa coc coh cok coo cor coz cra crc crh crk cro crr crz cz- czc czk czo haa hac hah hak hao har haz hca hcc hch hck hco hcr hha hhc hhh hhk hho hhr hhz hka hkh hkk hko hkr hoa hoc hoh hok hoo hor hr- hra hrc hrh hrk hro hrr hrz hzo k-z ka- kaa kac kah kak kao kar kaz kca kcc kch kck kcr kha khh khk kho khr khz kkc kkh kkk kkr koa koc koh kok koo kor koz kra krc krk kro krr kzo oaa oac oah oak oao oar oc- oca occ och ock oco ocr ocz oha ohc ohh oho ohr oka okc okk oko okr oo- ooa ooc ooh ook ooo oor or- ora orc orh ork oro orr orz oza ozo ozz ra- raa rac rah rak rao rar raz rca rcc rch rco rcr rh- rha rhc rhh rho rhr rkc rkk rko rkz roa roc roh rok roo ror roz rra rrc rrh rrk rrr rza rzo zaa zac zah zak zao zar zaz zco zha zhc zho zhr zka zo- zoa zoc zok zoo zor zrh zro zzr zzz