-al a-a a-b a-c aaa aab aac aaf aal aan aau ab- aba abb abc abf abl abn abu ac- aca acb acc acf acl acn acu af- afa afb afc aff afl afn afu al- ala alb alc alf all aln alu an- ana anb anc anf anl ann anu au- aua aub auc auf aul aun b-u baa bab bac baf bal ban bau bba bbb bbc bbf bbl bbn bbu bca bcb bcc bcf bcl bcn bcu bfa bfb bfc bff bfl bfn bfu bla blb blc blf bll bln blu bna bnb bnc bnf bnl bnn bnu bua bub buc buf bul bun buu c-- caa cab cac caf cal can cau cba cbb cbc cbf cbl cbn cbu cca ccb ccc ccf ccl ccn ccu cfa cfb cfc cff cfl cfn cfu cl- cla clb clc clf cll cln clu cn- cna cnb cnc cnf cnl cnn cnu cua cub cuc cuf cul cun cuu faa fab fac faf fal fan fau fba fbb fbc fbf fbl fbn fbu fca fcb fcc fcf fcl fcn fcu ffa ffc fff ffl ffn ffu fla flb flc flf fll fln flu fna fnb fnc fnf fnl fnn fnu fua fub fuf ful fun fuu la- laa lab lac laf lal lan lau lba lbb lbc lbf lbl lbu lca lcb lcc lcf lcl lcn lcu lfa lfb lfc lff lfl lfn lfu lla llb llc llf lll lln llu lna lnb lnc lnl lnn lnu lua lub luc luf lul lun luu naa nab nac naf nal nan nau nba nbb nbc nbf nbl nbn nbu nca ncb ncc ncf ncl ncn ncu nfa nfb nfc nff nfl nfn nfu nla nlb nlc nlf nll nln nlu nna nnb nnc nnf nnl nnn nnu nua nub nuc nul nun nuu ua- uaa uab uac uaf ual uan uau uba ubb ubc ubf ubl ubn ubu uca ucb ucc ucf ucl ucn ucu ufa ufc uff ufl ufn ufu ula ulb ulc ulf ull uln ulu un- una unb unc unf unl unn unu uua uuc uun uuu