-al a-a a-b a-c aaa aab aac aad aae aaf aal aan aau ab- aba abb abc abd abe abf abl abn abu ac- aca acb acc acd ace acf acl acn acu ad- ada adb adc add ade adf adl adn adu aea aeb aec aed aee aef ael aen aeu af- afa afb afc afd afe aff afl afn afu al- ala alb alc ald ale alf all aln alu an- ana anb anc and ane anf anl ann anu au- aua aub auc aud aue auf aul aun b-u baa bab bac bad bae baf bal ban bau bba bbb bbc bbd bbe bbf bbl bbn bbu bca bcb bcc bcd bce bcf bcl bcn bcu bda bdb bdc bdd bde bdf bdl bdu be- bea beb bec bed bee bef bel ben beu bfa bfb bfc bfd bfe bff bfl bfn bfu bla blb blc bld ble blf bll bln blu bna bnb bnc bnd bne bnf bnl bnn bnu bua bub buc bud bue buf bul bun buu c-- caa cab cac cad cae caf cal can cau cba cbb cbc cbd cbe cbf cbl cbn cbu cca ccb ccc ccd cce ccf ccl ccn ccu cda cdb cdc cdd cde cdf cdl cdn cdu ce- cea ceb cec ced cee cef cel cen ceu cfa cfb cfc cfd cfe cff cfl cfn cfu cl- cla clb clc cld cle clf cll cln clu cn- cna cnb cnc cnd cne cnf cnl cnn cnu cua cub cuc cud cue cuf cul cun cuu daa dab dac dad dae daf dal dan dau dba dbb dbc dbd dbe dbf dbl dbn dbu dca dcb dcc dcd dce dcf dcl dcn dcu dda ddb ddc ddd dde ddf ddl ddn ddu de- dea deb dec ded dee def del den deu dfa dfb dfc dfd dfe dff dfl dfn dfu dl- dla dlb dlc dld dle dlf dll dlu dna dnb dnc dnd dne dnf dnl dnn dua dub duc dud due duf dul dun eaa eab eac ead eae eaf eal ean eau eba ebb ebc ebd ebe ebf ebl ebn ebu ec- eca ecb ecc ecd ece ecf ecl ecn ecu ed- eda edb edc edd ede edf edl edn edu eea eeb eec eed eee eef eel een ef- efa efb efc efd efe eff efl ela elb elc eld ele elf ell eln elu en- ena enb enc end ene enf enl enn enu eu- eua eub euc eud eue euf eul eun faa fab fac fad fae faf fal fan fau fba fbb fbc fbd fbe fbf fbl fbn fbu fca fcb fcc fcd fce fcf fcl fcn fcu fda fdb fdc fdd fde fdf fdl fdn fdu fea feb fec fed fee fef fel fen feu ffa ffc ffd ffe fff ffl ffn ffu fla flb flc fld fle flf fll fln flu fna fnb fnc fnd fne fnf fnl fnn fnu fua fub fud fue fuf ful fun fuu la- laa lab lac lad lae laf lal lan lau lba lbb lbc lbd lbe lbf lbl lbu lca lcb lcc lcd lce lcf lcl lcn lcu lda ldb ldc ldd lde ldf ldl ldn ldu lea leb lec led lee lef lel len leu lfa lfb lfc lfd lfe lff lfl lfn lfu lla llb llc lld lle llf lll lln llu lna lnb lnc lnd lne lnl lnn lnu lua lub luc lud lue luf lul lun luu naa nab nac nad nae naf nal nan nau nba nbb nbc nbd nbe nbf nbl nbn nbu nca ncb ncc ncd nce ncf ncl ncn ncu nda ndb ndc ndd nde ndf ndl ndn ndu ne- nea neb nec ned nee nef nel nen neu nfa nfb nfc nfd nfe nff nfl nfn nfu nla nlb nlc nld nle nlf nll nln nlu nna nnb nnc nne nnf nnl nnn nnu nua nub nuc nud nue nul nun nuu ua- uaa uab uac uad uae uaf ual uan uau uba ubb ubc ube ubf ubl ubn ubu uca ucb ucc ucd uce ucf ucl ucn ucu uda udb udc udd ude udf udl udn udu uea ueb uec ued uee uef uel uen ufa ufc ufd ufe uff ufl ufn ufu ula ulb ulc uld ule ulf ull uln ulu un- una unb unc und une unf unl unn unu uua uuc uue uun uuu