-al a-a a-b a-c aaa aab aac aak aal aan aau ab- aba abb abc abk abl abn abu ac- aca acb acc ack acl acn acu aka akb akc akk akl akn aku al- ala alb alc alk all aln alu an- ana anb anc ank anl ann anu au- aua aub auc auk aul aun b-u baa bab bac bak bal ban bau bba bbb bbc bbk bbl bbn bbu bca bcb bcc bck bcl bcn bcu bka bkb bkc bkk bkl bkn bla blb blc blk bll bln blu bna bnb bnc bnk bnl bnn bnu bua bub buc buk bul bun buu c-- caa cab cac cak cal can cau cba cbb cbc cbk cbl cbn cbu cca ccb ccc cck ccl ccn ccu cka ckb ckc cl- cla clb clc clk cll cln clu cn- cna cnb cnc cnl cnn cnu cua cub cuc cuk cul cun cuu ka- kaa kab kac kak kal kan kau kba kbb kbc kbk kbl kbn kbu kca kcb kcc kck kcl kcn kcu kkb kkc kkk kkl kkn kku kl- kla klb klc klu kn- kna knc knk knl knn knu kub kuc kuk kul kun kuu la- laa lab lac lak lal lan lau lba lbb lbc lbk lbl lbu lca lcb lcc lck lcl lcn lcu lka lkb lkl lla llb llc llk lll lln llu lna lnb lnc lnk lnl lnn lnu lua lub luc luk lul lun luu naa nab nac nak nal nan nau nba nbb nbc nbk nbl nbn nbu nca ncb ncc nck ncl ncn ncu nka nkc nkk nkn nku nla nlb nlc nlk nll nln nlu nna nnb nnc nnk nnl nnn nnu nua nub nuc nuk nul nun nuu ua- uaa uab uac uak ual uan uau uba ubb ubc ubk ubl ubn ubu uca ucb ucc uck ucl ucn ucu uka ukb ukc ukk ukl ukn uku ula ulb ulc ulk ull uln ulu un- una unb unc unk unl unn unu uua uuc uun uuu