a-a a-b a-c a-t a-z aaa aab aac aak aao aar aat aay aaz ab- aba abb abc abk abo abr abt aby abz ac- aca acb acc ack aco acr act acy acz aka akb akc akk ako akr aoa aob aoc aok aoo aor aot ar- ara arb arc ark aro arr art ary arz at- ata atb atc ato atr att atz ay- aya ayc ayk ayo ayr ayt ayz az- aza azb azo azt azy azz baa bab bac bak bao bar bat bay baz bba bbb bbc bbk bbo bbr bbt bby bca bcb bcc bck bco bcr bct bcy bcz bka bkb bkc bkk bko bkr bkt boa bob boc bok boo bor bot boy boz bra brb brk bro brr brt bry brz bta btb btc btk bto btr btt bty btz by- bya byc byk byo byr byt byz bza bzo bzr bzz c-- caa cab cac cak cao car cat cay caz cba cbb cbc cbk cbo cbr cbt cby cbz cca ccb ccc cck cco ccr cct ccz cka ckb ckc cko ckt cky co- coa cob coc cok coo cor cot coy coz cra crb crc crk cro crr crt cry crz cta ctb ctc ctk cto ctr ctt cty ctz cya cyb cyc cyk cyo cyr cyt cz- czc czk czo czt k-t k-z ka- kaa kab kac kak kao kar kat kay kaz kba kbb kbc kbk kbo kbr kbz kca kcb kcc kck kcr kct kkb kkc kkk kkr kkt kky koa kob koc kok koo kor kot koy koz kra krc krk kro krr krt kry kta ktb ktc ktk kto ktr ktt kya kyc kyo kyr kyt kyz kzo kzy oaa oab oac oak oao oar oat ob- oba obb obc obk obo obr obt oby oc- oca ocb occ ock oco ocr oct ocz oka okb okc okk oko okr oo- ooa oob ooc ook ooo oor oot or- ora orb orc ork oro orr ort ory orz ot- ota otb otc otk oto otr ott otz oya oyo oza ozo ozt ozz ra- raa rab rac rak rao rar rat ray raz rba rbb rbc rbk rbo rbr rbt rca rcb rcc rco rcr rct rkb rkc rkk rko rkt rky rkz roa rob roc rok roo ror rot roy roz rra rrb rrc rrk rrr rrt rta rtb rtc rtk rto rtr rtt rty rtz ry- rya ryc ryk ryo ryr ryy ryz rza rzb rzo rzy taa tab tac tak tao tar tat tay taz tba tbb tbc tbk tbo tbr tbt tbz tca tcb tcc tck tco tcr tct tka tkb tkc tkk tko tkr tkt tky tkz to- toa tob toc tok too tor tot toy toz tra trb trc trk tro trr trt try trz tta ttb ttc ttk tto ttr ttt tty tya tyc tyo tyr tyt tza yaa yab yac yak yao yar yat yay yaz ybc ybr yby ybz yca ycc yco ycy yka ykk yob yoc yok yoo yor yot yoy yra yrc yro yrt yta ytc ytk yto ytr ytt yyb yyc yyt yyy yyz yzb yzr yzy zaa zab zac zak zao zar zat zay zaz zbb zbc zbr zbt zby zco zka zo- zoa zob zoc zok zoo zor zot zro zta ztr zzr zzt zzy zzz