-al a-a a-b a-c aaa aab aac aae aak aal aan aau ab- aba abb abc abe abk abl abn abu ac- aca acb acc ace ack acl acn acu aea aeb aec aee aek ael aen aeu aka akb akc ake akk akl akn aku al- ala alb alc ale alk all aln alu an- ana anb anc ane ank anl ann anu au- aua aub auc aue auk aul aun b-u baa bab bac bae bak bal ban bau bba bbb bbc bbe bbk bbl bbn bbu bca bcb bcc bce bck bcl bcn bcu be- bea beb bec bee bek bel ben beu bka bkb bkc bke bkk bkl bkn bla blb blc ble blk bll bln blu bna bnb bnc bne bnk bnl bnn bnu bua bub buc bue buk bul bun buu c-- caa cab cac cae cak cal can cau cba cbb cbc cbe cbk cbl cbn cbu cca ccb ccc cce cck ccl ccn ccu ce- cea ceb cec cee cek cel cen ceu cka ckb ckc cl- cla clb clc cle clk cll cln clu cn- cna cnb cnc cne cnl cnn cnu cua cub cuc cue cuk cul cun cuu eaa eab eac eae eak eal ean eau eba ebb ebc ebe ebk ebl ebn ebu ec- eca ecb ecc ece eck ecl ecn ecu eea eeb eec eee eek eel een eka ekb ekc eke ekl eku ela elb elc ele elk ell eln elu en- ena enb enc ene enk enl enn enu eu- eua eub euc eue eul eun ka- kaa kab kac kae kak kal kan kau kba kbb kbc kbe kbk kbl kbn kbu kca kcb kcc kce kck kcl kcn kcu ke- kea keb kec kee kek kel ken kkb kkc kke kkk kkl kkn kku kl- kla klb klc klu kn- kna knc kne knk knl knn knu kub kuc kue kuk kul kun kuu la- laa lab lac lae lak lal lan lau lba lbb lbc lbe lbk lbl lbu lca lcb lcc lce lck lcl lcn lcu lea leb lec lee lek lel len leu lka lkb lkl lla llb llc lle llk lll lln llu lna lnb lnc lne lnk lnl lnn lnu lua lub luc lue luk lul lun luu naa nab nac nae nak nal nan nau nba nbb nbc nbe nbk nbl nbn nbu nca ncb ncc nce nck ncl ncn ncu ne- nea neb nec nee nek nel nen neu nka nkc nke nkk nkn nku nla nlb nlc nle nlk nll nln nlu nna nnb nnc nne nnk nnl nnn nnu nua nub nuc nue nuk nul nun nuu ua- uaa uab uac uae uak ual uan uau uba ubb ubc ube ubk ubl ubn ubu uca ucb ucc uce uck ucl ucn ucu uea ueb uec uee uel uen uka ukb ukc uke ukk ukl ukn uku ula ulb ulc ule ulk ull uln ulu un- una unb unc une unk unl unn unu uua uuc uue uun uuu