a-a a-b a-c a-z aaa aab aac aam aan aao aar aau aaz ab- aba abb abc abm abn abo abr abu abz ac- aca acb acc acm acn aco acr acu acz ama amb amc amm amn amo amr amu amz an- ana anb anc anm ann ano anr anu anz aoa aob aoc aom aon aoo aor aou ar- ara arb arc arm arn aro arr aru arz au- aua aub auc aum aun auo aur auz az- aza azb azm azn azo azu azz b-u baa bab bac bam ban bao bar bau baz bba bbb bbc bbm bbn bbo bbr bbu bca bcb bcc bcm bcn bco bcr bcu bcz bma bmb bmc bmm bmn bmo bmr bmu bmz bna bnb bnc bnn bno bnr bnu bnz boa bob boc bom bon boo bor bou boz bra brb brm brn bro brr bru brz bua bub buc bum bun buo bur buu buz bza bzn bzo bzr bzu bzz c-- caa cab cac cam can cao car cau caz cba cbb cbc cbm cbn cbo cbr cbu cbz cca ccb ccc ccm ccn cco ccr ccu ccz cma cmb cmc cmm cmn cmo cmr cmu cn- cna cnb cnc cnm cnn cno cnr cnu co- coa cob coc com con coo cor cou coz cra crb crc crm crn cro crr cru crz cua cub cuc cum cun cuo cur cuu cuz cz- czc czm czo m-o m-r maa mab mac mam man mao mar mau maz mba mbb mbc mbm mbo mbr mbu mc- mca mcb mcc mcm mcn mco mcr mcu mcz mma mmb mmc mmm mmn mmo mmr mmu mmz mna mnb mnc mnm mnn mno mnr mnu mnz moa mob moc mom mon moo mor mou moz mra mrb mrc mrm mrn mro mrr mru mrz mua mub muc mum mun mur muu mza mzb mzm mzn naa nab nac nam nan nao nar nau naz nba nbb nbc nbm nbn nbo nbr nbu nca ncb ncc ncm ncn nco ncr ncu nma nmb nmc nmm nmn nmo nmr nmu nmz nna nnb nnc nnm nnn nno nnu nnz no- noa nob noc nom non noo nor nou noz nra nrb nrc nrm nrn nro nrr nru nrz nua nub nuc num nun nuo nur nuu nzb nzo nzz oaa oab oac oam oan oao oar oau ob- oba obb obc obm obn obo obr obu oc- oca ocb occ ocm ocn oco ocr ocu ocz om- oma omb omc omm omn omo omr omu omz on- ona onb onc onn ono onr onu oo- ooa oob ooc oom oon ooo oor or- ora orb orc orm orn oro orr oru orz ou- oua ouc oum oun ouo our oza ozm ozo ozu ozz ra- raa rab rac ram ran rao rar rau raz rba rbb rbc rbm rbn rbo rbr rbu rca rcb rcc rcm rcn rco rcr rcu rma rmb rmc rmm rmn rmo rmr rna rnb rnc rnm rnn rno rnr rnu rnz roa rob roc rom ron roo ror rou roz rra rrb rrc rrm rrn rrr rru rua rub ruc rum run ruo rur ruu ruz rza rzb rzm rzo ua- uaa uab uac uam uan uao uar uau uaz uba ubb ubc ubn ubo ubr ubu uca ucb ucc ucm ucn uco ucr ucu um- uma umb umc umm umn umo umr umu un- una unb unc unm unn uno unr unu uoa uob uoc uom uon uoo uor ur- ura urb urc urm urn uro urr uru urz uua uuc uum uun uur uuu uza uzb uzo uzu zaa zab zac zam zan zao zar zaz zbb zbc zbm zbr zco zma zmb zmc zmm znc znn zno zo- zoa zob zoc zom zon zoo zor zou zro zub zuc zum zun zur zuz zzr zzz