a-a a-b a-c a-z aaa aab aac aah aak aao aar aay aaz ab- aba abb abc abh abk abo abr aby abz ac- aca acb acc ach ack aco acr acy acz aha ahb ahc ahh ahk aho ahr ahy ahz aka akb akc akh akk ako akr aoa aob aoc aoh aok aoo aor ar- ara arb arc arh ark aro arr ary arz ay- aya ayc ayh ayk ayo ayr ayz az- aza azb azo azy azz baa bab bac bah bak bao bar bay baz bba bbb bbc bbh bbk bbo bbr bby bca bcb bcc bch bck bco bcr bcy bcz bha bhb bhc bhh bhk bho bhr bka bkb bkc bkk bko bkr boa bob boc boh bok boo bor boy boz bra brb brh brk bro brr bry brz by- bya byc byh byk byo byr byz bza bzh bzo bzr bzz c-- caa cab cac cah cak cao car cay caz cba cbb cbc cbh cbk cbo cbr cby cbz cca ccb ccc cch cck cco ccr ccz ch- cha chb chc chh chk cho chr chy chz cka ckb ckc ckh cko cky co- coa cob coc coh cok coo cor coy coz cra crb crc crh crk cro crr cry crz cya cyb cyc cyk cyo cyr cz- czc czk czo haa hab hac hah hak hao har hay haz hba hbb hbc hbh hbk hbo hbr hby hbz hca hcb hcc hch hck hco hcr hcy hha hhb hhc hhh hhk hho hhr hhy hhz hka hkb hkh hkk hko hkr hoa hob hoc hoh hok hoo hor hoy hr- hra hrb hrc hrh hrk hro hrr hrz hy- hya hyb hyc hyh hyo hyr hyy hzo hzy k-z ka- kaa kab kac kah kak kao kar kay kaz kba kbb kbc kbh kbk kbo kbr kbz kca kcb kcc kch kck kcr kha khh khk kho khr khz kkb kkc kkh kkk kkr kky koa kob koc koh kok koo kor koy koz kra krc krk kro krr kry kya kyc kyo kyr kyz kzo kzy oaa oab oac oah oak oao oar ob- oba obb obc obh obk obo obr oby oc- oca ocb occ och ock oco ocr ocz oha ohc ohh oho ohr oka okb okc okk oko okr oo- ooa oob ooc ooh ook ooo oor or- ora orb orc orh ork oro orr ory orz oya oyo oza ozo ozz ra- raa rab rac rah rak rao rar ray raz rba rbb rbc rbh rbk rbo rbr rca rcb rcc rch rco rcr rh- rha rhb rhc rhh rho rhr rkb rkc rkk rko rky rkz roa rob roc roh rok roo ror roy roz rra rrb rrc rrh rrk rrr ry- rya ryc ryk ryo ryr ryy ryz rza rzb rzo rzy yaa yab yac yah yak yao yar yay yaz ybc ybr yby ybz yca ycc ych yco ycy yha yhc yka ykk yob yoc yok yoo yor yoy yra yrc yro yyb yyc yyy yyz yzb yzr yzy zaa zab zac zah zak zao zar zay zaz zbb zbc zbr zby zco zha zhc zho zhr zka zo- zoa zob zoc zok zoo zor zrh zro zzr zzy zzz