a-a a-b a-c a-z aaa aab aac aah aak aao aay aaz ab- aba abb abc abh abk abo aby abz ac- aca acb acc ach ack aco acy acz aha ahb ahc ahh ahk aho ahy ahz aka akb akc akh akk ako aoa aob aoc aoh aok aoo ay- aya ayc ayh ayk ayo ayz az- aza azb azo azy azz baa bab bac bah bak bao bay baz bba bbb bbc bbh bbk bbo bby bca bcb bcc bch bck bco bcy bcz bha bhb bhc bhh bhk bho bka bkb bkc bkk bko boa bob boc boh bok boo boy boz by- bya byc byh byk byo byz bza bzh bzo bzz c-- caa cab cac cah cak cao cay caz cba cbb cbc cbh cbk cbo cby cbz cca ccb ccc cch cck cco ccz ch- cha chb chc chh chk cho chy chz cka ckb ckc ckh cko cky co- coa cob coc coh cok coo coy coz cya cyb cyc cyk cyo cz- czc czk czo haa hab hac hah hak hao hay haz hba hbb hbc hbh hbk hbo hby hbz hca hcb hcc hch hck hco hcy hha hhb hhc hhh hhk hho hhy hhz hka hkb hkh hkk hko hoa hob hoc hoh hok hoo hoy hy- hya hyb hyc hyh hyo hyy hzo hzy k-z ka- kaa kab kac kah kak kao kay kaz kba kbb kbc kbh kbk kbo kbz kca kcb kcc kch kck kha khh khk kho khz kkb kkc kkh kkk kky koa kob koc koh kok koo koy koz kya kyc kyo kyz kzo kzy oaa oab oac oah oak oao ob- oba obb obc obh obk obo oby oc- oca ocb occ och ock oco ocz oha ohc ohh oho oka okb okc okk oko oo- ooa oob ooc ooh ook ooo oya oyo oza ozo ozz yaa yab yac yah yak yao yay yaz ybc yby ybz yca ycc ych yco ycy yha yhc yka ykk yob yoc yok yoo yoy yyb yyc yyy yyz yzb yzy zaa zab zac zah zak zao zay zaz zbb zbc zby zco zha zhc zho zka zo- zoa zob zoc zok zoo zzy zzz