a-a a-b a-c a-z aaa aab aac aaf aaj aan aao aar aau aaz ab- aba abb abc abf abj abn abo abr abu abz ac- aca acb acc acf acj acn aco acr acu acz af- afa afb afc aff afj afn afo afr afu afz aja ajb ajc ajf ajj ajn ajo ajr aju an- ana anb anc anf anj ann ano anr anu anz aoa aob aoc aof aoj aon aoo aor aou ar- ara arb arc arf arj arn aro arr aru arz au- aua aub auc auf auj aun auo aur auz az- aza azb azf azn azo azu azz b-u baa bab bac baf baj ban bao bar bau baz bba bbb bbc bbf bbn bbo bbr bbu bca bcb bcc bcf bcj bcn bco bcr bcu bcz bfa bfb bfc bff bfj bfn bfo bfr bfu bfz bja bjc bjf bjj bjn bjr bju bna bnb bnc bnf bnj bnn bno bnr bnu bnz boa bob boc bof boj bon boo bor bou boz bra brb brf brj brn bro brr bru brz bua bub buc buf buj bun buo bur buu buz bza bzf bzn bzo bzr bzu bzz c-- c-j caa cab cac caf caj can cao car cau caz cba cbb cbc cbf cbj cbn cbo cbr cbu cbz cca ccb ccc ccf ccj ccn cco ccr ccu ccz cfa cfb cfc cff cfn cfo cfr cfu cfz cja cjb cjc cjf cjr cn- cna cnb cnc cnf cnj cnn cno cnr cnu co- coa cob coc cof coj con coo cor cou coz cra crb crc crf crj crn cro crr cru crz cua cub cuc cuf cun cuo cur cuu cuz cz- czc czj czo faa fab fac faf faj fan fao far fau faz fba fbb fbc fbf fbn fbo fbr fbu fca fcb fcc fcf fcj fcn fco fcr fcu fcz ffa ffc fff ffn ffo ffr ffu ffz fja fjb fjc fna fnb fnc fnf fnj fnn fnr fnu fnz foa fob foc fof fon foo for fou foz fra frb frc frf frj frn fro frr fru fua fub fuf fun fuo fur fuu j-z jaa jab jac jaf jaj jan jao jar jau jaz jba jbc jbf jbj jbo jbr jbu jbz jca jcb jcc jcf jco jcr jcu jfa jfb jfc jff jfj jfo jfr jja jjb jjc jjf jjj jjr jju jna jnc jnf jnj jnn jno jnr jnu joa job joc jof joj jon joo jor jou jra jrb jrc jrf jrn jro jrr jrz jub juf jun juo jur juz naa nab nac naf naj nan nao nar nau naz nba nbb nbc nbf nbn nbo nbr nbu nca ncb ncc ncf ncn nco ncr ncu nfa nfb nfc nff nfn nfo nfr nfu nja njc njf njn nju nna nnb nnc nnf nnn nno nnu nnz no- noa nob noc nof noj non noo nor nou noz nra nrb nrc nrf nrj nrn nro nrr nru nrz nua nub nuc nuj nun nuo nur nuu nzb nzf nzo nzz oaa oab oac oaf oaj oan oao oar oau ob- oba obb obc obf obj obn obo obr obu oc- oca ocb occ ocf ocj ocn oco ocr ocu ocz of- ofa ofb ofc off ofn ofo ofr ofu ofz oja ojb ojc ojo oju on- ona onb onc onf onj onn ono onr onu oo- ooa oob ooc oof oon ooo oor or- ora orb orc orf orn oro orr oru orz ou- oua ouc ouf oun ouo our oza ozo ozu ozz ra- raa rab rac raf raj ran rao rar rau raz rba rbb rbc rbf rbn rbo rbr rbu rca rcb rcc rcf rcj rcn rco rcr rcu rfa rfb rfc rff rfj rfn rfo rfr rfu rfz rja rjc rjf rjr rna rnb rnc rnn rno rnr rnu rnz roa rob roc rof roj ron roo ror rou roz rra rrb rrc rrf rrn rrr rru rua rub ruc ruf run ruo rur ruu ruz rza rzb rzo ua- uaa uab uac uaf uaj uan uao uar uau uaz uba ubb ubc ubf ubn ubo ubr ubu uca ucb ucc ucf ucj ucn uco ucr ucu ufa ufc uff ufj ufn ufo ufr ufu ujc ujo un- una unb unc unf unn uno unr unu uoa uob uoc uoj uon uoo uor ur- ura urb urc urf urn uro urr uru urz uua uuc uun uur uuu uza uzb uzo uzu zaa zab zac zaf zaj zan zao zar zaz zbb zbc zbr zco zfa zfc zfn zfr znc znn zno zo- zoa zob zoc zof zon zoo zor zou zro zub zuc zun zur zuz zzr zzz