-al -ol a-a a-b a-c aaa aab aac aad aae aaf aal aan aao aau ab- aba abb abc abd abe abf abl abn abo abu ac- aca acb acc acd ace acf acl acn aco acu ad- ada adb adc add ade adf adl adn ado adu aea aeb aec aed aee aef ael aen aeo aeu af- afa afb afc afd afe aff afl afn afo afu al- ala alb alc ald ale alf all aln alo alu an- ana anb anc and ane anf anl ann ano anu aoa aob aoc aod aoe aof aol aon aoo aou au- aua aub auc aud aue auf aul aun auo b-u baa bab bac bad bae baf bal ban bao bau bba bbb bbc bbd bbe bbf bbl bbn bbo bbu bca bcb bcc bcd bce bcf bcl bcn bco bcu bda bdb bdc bdd bde bdf bdl bdo bdu be- bea beb bec bed bee bef bel ben beo beu bfa bfb bfc bfd bfe bff bfl bfn bfo bfu bla blb blc bld ble blf bll bln blo blu bna bnb bnc bnd bne bnf bnl bnn bno bnu boa bob boc bod boe bof bol bon boo bou bua bub buc bud bue buf bul bun buo buu c-- caa cab cac cad cae caf cal can cao cau cba cbb cbc cbd cbe cbf cbl cbn cbo cbu cca ccb ccc ccd cce ccf ccl ccn cco ccu cda cdb cdc cdd cde cdf cdl cdn cdo cdu ce- cea ceb cec ced cee cef cel cen ceo ceu cfa cfb cfc cfd cfe cff cfl cfn cfo cfu cl- cla clb clc cld cle clf cll cln clo clu cn- cna cnb cnc cnd cne cnf cnl cnn cno cnu co- coa cob coc cod coe cof col con coo cou cua cub cuc cud cue cuf cul cun cuo cuu daa dab dac dad dae daf dal dan dao dau dba dbb dbc dbd dbe dbf dbl dbn dbo dbu dca dcb dcc dcd dce dcf dcl dcn dco dcu dda ddb ddc ddd dde ddf ddl ddn ddo ddu de- dea deb dec ded dee def del den deo deu dfa dfb dfc dfd dfe dff dfl dfn dfo dfu dl- dla dlb dlc dld dle dlf dll dlo dlu dna dnb dnc dnd dne dnf dnl dnn dno doa dob doc dod doe dof dol don doo dou dua dub duc dud due duf dul dun duo eaa eab eac ead eae eaf eal ean eao eau eba ebb ebc ebd ebe ebf ebl ebn ebo ebu ec- eca ecb ecc ecd ece ecf ecl ecn eco ecu ed- eda edb edc edd ede edf edl edn edo edu eea eeb eec eed eee eef eel een eeo ef- efa efb efc efd efe eff efl efo ela elb elc eld ele elf ell eln elo elu en- ena enb enc end ene enf enl enn eno enu eo- eoa eob eoc eod eoe eof eol eon eoo eou eu- eua eub euc eud eue euf eul eun faa fab fac fad fae faf fal fan fao fau fba fbb fbc fbd fbe fbf fbl fbn fbo fbu fca fcb fcc fcd fce fcf fcl fcn fco fcu fda fdb fdc fdd fde fdf fdl fdn fdo fdu fea feb fec fed fee fef fel fen feo feu ffa ffc ffd ffe fff ffl ffn ffo ffu fla flb flc fld fle flf fll fln flo flu fna fnb fnc fnd fne fnf fnl fnn fnu foa fob foc foe fof fol fon foo fou fua fub fud fue fuf ful fun fuo fuu la- laa lab lac lad lae laf lal lan lao lau lba lbb lbc lbd lbe lbf lbl lbo lbu lca lcb lcc lcd lce lcf lcl lcn lco lcu lda ldb ldc ldd lde ldf ldl ldn ldo ldu lea leb lec led lee lef lel len leo leu lfa lfb lfc lfd lfe lff lfl lfn lfo lfu lla llb llc lld lle llf lll lln llo llu lna lnb lnc lnd lne lnl lnn lno lnu loa lob loc lod loe lof lol lon loo lou lua lub luc lud lue luf lul lun luo luu naa nab nac nad nae naf nal nan nao nau nba nbb nbc nbd nbe nbf nbl nbn nbo nbu nca ncb ncc ncd nce ncf ncl ncn nco ncu nda ndb ndc ndd nde ndf ndl ndn ndo ndu ne- nea neb nec ned nee nef nel nen neo neu nfa nfb nfc nfd nfe nff nfl nfn nfo nfu nla nlb nlc nld nle nlf nll nln nlo nlu nna nnb nnc nne nnf nnl nnn nno nnu no- noa nob noc nod noe nof nol non noo nou nua nub nuc nud nue nul nun nuo nuu oaa oab oac oad oae oaf oal oan oao oau ob- oba obb obc obd obe obf obl obn obo obu oc- oca ocb occ ocd ocf ocl ocn oco ocu oda odb odc odd ode odf odl odn odo odu oea oeb oec oed oee oef oel oen oeo of- ofa ofb ofc ofd ofe off ofl ofn ofo ofu ola olb olc old ole olf oll oln olo olu on- ona onb onc ond one onf onl onn ono onu oo- ooa oob ooc ood oof ool oon ooo ou- oua ouc oud oue ouf oul oun ouo ua- uaa uab uac uad uae uaf ual uan uao uau uba ubb ubc ube ubf ubl ubn ubo ubu uca ucb ucc ucd uce ucf ucl ucn uco ucu uda udb udc udd ude udf udl udn udo udu uea ueb uec ued uee uef uel uen ufa ufc ufd ufe uff ufl ufn ufo ufu ula ulb ulc uld ule ulf ull uln ulo ulu un- una unb unc und une unf unl unn uno unu uoa uob uoc uod uoe uol uon uoo uua uuc