a-a a-b a-c a-z aaa aab aac aak aan aao aar aau aaz ab- aba abb abc abk abn abo abr abu abz ac- aca acb acc ack acn aco acr acu acz aka akb akc akk akn ako akr aku an- ana anb anc ank ann ano anr anu anz aoa aob aoc aok aon aoo aor aou ar- ara arb arc ark arn aro arr aru arz au- aua aub auc auk aun auo aur auz az- aza azb azn azo azu azz b-u baa bab bac bak ban bao bar bau baz bba bbb bbc bbk bbn bbo bbr bbu bca bcb bcc bck bcn bco bcr bcu bcz bka bkb bkc bkk bkn bko bkr bna bnb bnc bnk bnn bno bnr bnu bnz boa bob boc bok bon boo bor bou boz bra brb brk brn bro brr bru brz bua bub buc buk bun buo bur buu buz bza bzn bzo bzr bzu bzz c-- caa cab cac cak can cao car cau caz cba cbb cbc cbk cbn cbo cbr cbu cbz cca ccb ccc cck ccn cco ccr ccu ccz cka ckb ckc cko cn- cna cnb cnc cnn cno cnr cnu co- coa cob coc cok con coo cor cou coz cra crb crc crk crn cro crr cru crz cua cub cuc cuk cun cuo cur cuu cuz cz- czc czk czo k-z ka- kaa kab kac kak kan kao kar kau kaz kba kbb kbc kbk kbn kbo kbr kbu kbz kca kcb kcc kck kcn kcr kcu kkb kkc kkk kkn kkr kku kn- kna knc knk knn kno knr knu koa kob koc kok kon koo kor kou koz kra krc krk krn kro krr kru kub kuc kuk kun kur kuu kzo naa nab nac nak nan nao nar nau naz nba nbb nbc nbk nbn nbo nbr nbu nca ncb ncc nck ncn nco ncr ncu nka nkc nkk nkn nko nkr nku nna nnb nnc nnk nnn nno nnu nnz no- noa nob noc nok non noo nor nou noz nra nrb nrc nrk nrn nro nrr nru nrz nua nub nuc nuk nun nuo nur nuu nzb nzo nzz oaa oab oac oak oan oao oar oau ob- oba obb obc obk obn obo obr obu oc- oca ocb occ ock ocn oco ocr ocu ocz oka okb okc okk oko okr oku on- ona onb onc onk onn ono onr onu oo- ooa oob ooc ook oon ooo oor or- ora orb orc ork orn oro orr oru orz ou- oua ouc ouk oun ouo our oza ozo ozu ozz ra- raa rab rac rak ran rao rar rau raz rba rbb rbc rbk rbn rbo rbr rbu rca rcb rcc rcn rco rcr rcu rkb rkc rkk rko rku rkz rna rnb rnc rnn rno rnr rnu rnz roa rob roc rok ron roo ror rou roz rra rrb rrc rrk rrn rrr rru rua rub ruc ruk run ruo rur ruu ruz rza rzb rzo ua- uaa uab uac uak uan uao uar uau uaz uba ubb ubc ubk ubn ubo ubr ubu uca ucb ucc uck ucn uco ucr ucu uka ukb ukc ukk ukn ukr uku ukz un- una unb unc unk unn uno unr unu uoa uob uoc uok uon uoo uor ur- ura urb urc urk urn uro urr uru urz uua uuc uun uur uuu uza uzb uzo uzu zaa zab zac zak zan zao zar zaz zbb zbc zbr zco zka znc znn zno zo- zoa zob zoc zok zon zoo zor zou zro zub zuc zuk zun zur zuz zzr zzz