-al a-a a-b a-c aaa aab aac aad aak aal aan aau ab- aba abb abc abd abk abl abn abu ac- aca acb acc acd ack acl acn acu ad- ada adb adc add adk adl adn adu aka akb akc akd akk akl akn aku al- ala alb alc ald alk all aln alu an- ana anb anc and ank anl ann anu au- aua aub auc aud auk aul aun b-u baa bab bac bad bak bal ban bau bba bbb bbc bbd bbk bbl bbn bbu bca bcb bcc bcd bck bcl bcn bcu bda bdb bdc bdd bdk bdl bdu bka bkb bkc bkk bkl bkn bla blb blc bld blk bll bln blu bna bnb bnc bnd bnk bnl bnn bnu bua bub buc bud buk bul bun buu c-- caa cab cac cad cak cal can cau cba cbb cbc cbd cbk cbl cbn cbu cca ccb ccc ccd cck ccl ccn ccu cda cdb cdc cdd cdk cdl cdn cdu cka ckb ckc ckd cl- cla clb clc cld clk cll cln clu cn- cna cnb cnc cnd cnl cnn cnu cua cub cuc cud cuk cul cun cuu daa dab dac dad dak dal dan dau dba dbb dbc dbd dbk dbl dbn dbu dca dcb dcc dcd dck dcl dcn dcu dda ddb ddc ddd ddk ddl ddn ddu dka dkb dkc dkk dkl dku dl- dla dlb dlc dld dlk dll dlu dna dnb dnc dnd dnk dnl dnn dua dub duc dud duk dul dun ka- kaa kab kac kad kak kal kan kau kba kbb kbc kbd kbk kbl kbn kbu kca kcb kcc kcd kck kcl kcn kcu kda kdb kdc kdk kdl kdu kkb kkc kkk kkl kkn kku kl- kla klb klc kld klu kn- kna knc knd knk knl knn knu kub kuc kud kuk kul kun kuu la- laa lab lac lad lak lal lan lau lba lbb lbc lbd lbk lbl lbu lca lcb lcc lcd lck lcl lcn lcu lda ldb ldc ldd ldk ldl ldn ldu lka lkb lkl lla llb llc lld llk lll lln llu lna lnb lnc lnd lnk lnl lnn lnu lua lub luc lud luk lul lun luu naa nab nac nad nak nal nan nau nba nbb nbc nbd nbk nbl nbn nbu nca ncb ncc ncd nck ncl ncn ncu nda ndb ndc ndd ndk ndl ndn ndu nka nkc nkk nkn nku nla nlb nlc nld nlk nll nln nlu nna nnb nnc nnk nnl nnn nnu nua nub nuc nud nuk nul nun nuu ua- uaa uab uac uad uak ual uan uau uba ubb ubc ubk ubl ubn ubu uca ucb ucc ucd uck ucl ucn ucu uda udb udc udd udk udl udn udu uka ukb ukc ukk ukl ukn uku ula ulb ulc uld ulk ull uln ulu un- una unb unc und unk unl unn unu uua uuc uun uuu