-al a-a a-b a-c aaa aab aac aae aaf aak aal aan aau ab- aba abb abc abe abf abk abl abn abu ac- aca acb acc ace acf ack acl acn acu aea aeb aec aee aef aek ael aen aeu af- afa afb afc afe aff afk afl afn afu aka akb akc ake akk akl akn aku al- ala alb alc ale alf alk all aln alu an- ana anb anc ane anf ank anl ann anu au- aua aub auc aue auf auk aul aun b-u baa bab bac bae baf bak bal ban bau bba bbb bbc bbe bbf bbk bbl bbn bbu bca bcb bcc bce bcf bck bcl bcn bcu be- bea beb bec bee bef bek bel ben beu bfa bfb bfc bfe bff bfl bfn bfu bka bkb bkc bke bkf bkk bkl bkn bla blb blc ble blf blk bll bln blu bna bnb bnc bne bnf bnk bnl bnn bnu bua bub buc bue buf buk bul bun buu c-- caa cab cac cae caf cak cal can cau cba cbb cbc cbe cbf cbk cbl cbn cbu cca ccb ccc cce ccf cck ccl ccn ccu ce- cea ceb cec cee cef cek cel cen ceu cfa cfb cfc cfe cff cfk cfl cfn cfu cka ckb ckc cl- cla clb clc cle clf clk cll cln clu cn- cna cnb cnc cne cnf cnl cnn cnu cua cub cuc cue cuf cuk cul cun cuu eaa eab eac eae eaf eak eal ean eau eba ebb ebc ebe ebf ebk ebl ebn ebu ec- eca ecb ecc ece ecf eck ecl ecn ecu eea eeb eec eee eef eek eel een ef- efa efb efc efe eff efl eka ekb ekc eke ekf ekl eku ela elb elc ele elf elk ell eln elu en- ena enb enc ene enf enk enl enn enu eu- eua eub euc eue euf eul eun faa fab fac fae faf fak fal fan fau fba fbb fbc fbe fbf fbk fbl fbn fbu fca fcb fcc fce fcf fck fcl fcn fcu fea feb fec fee fef fek fel fen feu ffa ffc ffe fff ffk ffl ffn ffu fka fkb fkc fkf fkk fkl fla flb flc fle flf fll fln flu fna fnb fnc fne fnf fnk fnl fnn fnu fua fub fue fuf fuk ful fun fuu ka- kaa kab kac kae kaf kak kal kan kau kba kbb kbc kbe kbf kbk kbl kbn kbu kca kcb kcc kce kck kcl kcn kcu ke- kea keb kec kee kef kek kel ken kfa kfc kff kfu kkb kkc kke kkk kkl kkn kku kl- kla klb klc klf klu kn- kna knc kne knf knk knl knn knu kub kuc kue kuk kul kun kuu la- laa lab lac lae laf lak lal lan lau lba lbb lbc lbe lbf lbk lbl lbu lca lcb lcc lce lcf lck lcl lcn lcu lea leb lec lee lef lek lel len leu lfa lfb lfc lfe lff lfk lfl lfn lfu lka lkb lkl lla llb llc lle llf llk lll lln llu lna lnb lnc lne lnk lnl lnn lnu lua lub luc lue luf luk lul lun luu naa nab nac nae naf nak nal nan nau nba nbb nbc nbe nbf nbk nbl nbn nbu nca ncb ncc nce ncf nck ncl ncn ncu ne- nea neb nec nee nef nek nel nen neu nfa nfb nfc nfe nff nfk nfl nfn nfu nka nkc nke nkf nkk nkn nku nla nlb nlc nle nlf nlk nll nln nlu nna nnb nnc nne nnf nnk nnl nnn nnu nua nub nuc nue nuk nul nun nuu ua- uaa uab uac uae uaf uak ual uan uau uba ubb ubc ube ubf ubk ubl ubn ubu uca ucb ucc uce ucf uck ucl ucn ucu uea ueb uec uee uef uel uen ufa ufc ufe uff ufl ufn ufu uka ukb ukc uke ukf ukk ukl ukn uku ula ulb ulc ule ulf ulk ull uln ulu un- una unb unc une unf unk unl unn unu uua uuc uue uun uuu