-al a-a a-b a-c aaa aab aac aal aan aau ab- aba abb abc abl abn abu ac- aca acb acc acl acn acu al- ala alb alc all aln alu an- ana anb anc anl ann anu au- aua aub auc aul aun b-u baa bab bac bal ban bau bba bbb bbc bbl bbn bbu bca bcb bcc bcl bcn bcu bla blb blc bll bln blu bna bnb bnc bnl bnn bnu bua bub buc bul bun buu c-- caa cab cac cal can cau cba cbb cbc cbl cbn cbu cca ccb ccc ccl ccn ccu cl- cla clb clc cll cln clu cn- cna cnb cnc cnl cnn cnu cua cub cuc cul cun cuu la- laa lab lac lal lan lau lba lbb lbc lbl lbu lca lcb lcc lcl lcn lcu lla llb llc lll lln llu lna lnb lnc lnl lnn lnu lua lub luc lul lun luu naa nab nac nal nan nau nba nbb nbc nbl nbn nbu nca ncb ncc ncl ncn ncu nla nlb nlc nll nln nlu nna nnb nnc nnl nnn nnu nua nub nuc nul nun nuu ua- uaa uab uac ual uan uau uba ubb ubc ubl ubn ubu uca ucb ucc ucl ucn ucu ula ulb ulc ull uln ulu un- una unb unc unl unn unu uua uuc uun uuu