-al -ol a-a a-b a-c aaa aab aac aad aaf aal aan aao aau ab- aba abb abc abd abf abl abn abo abu ac- aca acb acc acd acf acl acn aco acu ad- ada adb adc add adf adl adn ado adu af- afa afb afc afd aff afl afn afo afu al- ala alb alc ald alf all aln alo alu an- ana anb anc and anf anl ann ano anu aoa aob aoc aod aof aol aon aoo aou au- aua aub auc aud auf aul aun auo b-u baa bab bac bad baf bal ban bao bau bba bbb bbc bbd bbf bbl bbn bbo bbu bca bcb bcc bcd bcf bcl bcn bco bcu bda bdb bdc bdd bdf bdl bdo bdu bfa bfb bfc bfd bff bfl bfn bfo bfu bla blb blc bld blf bll bln blo blu bna bnb bnc bnd bnf bnl bnn bno bnu boa bob boc bod bof bol bon boo bou bua bub buc bud buf bul bun buo buu c-- caa cab cac cad caf cal can cao cau cba cbb cbc cbd cbf cbl cbn cbo cbu cca ccb ccc ccd ccf ccl ccn cco ccu cda cdb cdc cdd cdf cdl cdn cdo cdu cfa cfb cfc cfd cff cfl cfn cfo cfu cl- cla clb clc cld clf cll cln clo clu cn- cna cnb cnc cnd cnf cnl cnn cno cnu co- coa cob coc cod cof col con coo cou cua cub cuc cud cuf cul cun cuo cuu daa dab dac dad daf dal dan dao dau dba dbb dbc dbd dbf dbl dbn dbo dbu dca dcb dcc dcd dcf dcl dcn dco dcu dda ddb ddc ddd ddf ddl ddn ddo ddu dfa dfb dfc dfd dff dfl dfn dfo dfu dl- dla dlb dlc dld dlf dll dlo dlu dna dnb dnc dnd dnf dnl dnn dno doa dob doc dod dof dol don doo dou dua dub duc dud duf dul dun duo faa fab fac fad faf fal fan fao fau fba fbb fbc fbd fbf fbl fbn fbo fbu fca fcb fcc fcd fcf fcl fcn fco fcu fda fdb fdc fdd fdf fdl fdn fdo fdu ffa ffc ffd fff ffl ffn ffo ffu fla flb flc fld flf fll fln flo flu fna fnb fnc fnd fnf fnl fnn fnu foa fob foc fof fol fon foo fou fua fub fud fuf ful fun fuo fuu la- laa lab lac lad laf lal lan lao lau lba lbb lbc lbd lbf lbl lbo lbu lca lcb lcc lcd lcf lcl lcn lco lcu lda ldb ldc ldd ldf ldl ldn ldo ldu lfa lfb lfc lfd lff lfl lfn lfo lfu lla llb llc lld llf lll lln llo llu lna lnb lnc lnd lnl lnn lno lnu loa lob loc lod lof lol lon loo lou lua lub luc lud luf lul lun luo luu naa nab nac nad naf nal nan nao nau nba nbb nbc nbd nbf nbl nbn nbo nbu nca ncb ncc ncd ncf ncl ncn nco ncu nda ndb ndc ndd ndf ndl ndn ndo ndu nfa nfb nfc nfd nff nfl nfn nfo nfu nla nlb nlc nld nlf nll nln nlo nlu nna nnb nnc nnf nnl nnn nno nnu no- noa nob noc nod nof nol non noo nou nua nub nuc nud nul nun nuo nuu oaa oab oac oad oaf oal oan oao oau ob- oba obb obc obd obf obl obn obo obu oc- oca ocb occ ocd ocf ocl ocn oco ocu oda odb odc odd odf odl odn odo odu of- ofa ofb ofc ofd off ofl ofn ofo ofu ola olb olc old olf oll oln olo olu on- ona onb onc ond onf onl onn ono onu oo- ooa oob ooc ood oof ool oon ooo ou- oua ouc oud ouf oul oun ouo ua- uaa uab uac uad uaf ual uan uao uau uba ubb ubc ubf ubl ubn ubo ubu uca ucb ucc ucd ucf ucl ucn uco ucu uda udb udc udd udf udl udn udo udu ufa ufc ufd uff ufl ufn ufo ufu ula ulb ulc uld ulf ull uln ulo ulu un- una unb unc und unf unl unn uno unu uoa uob uoc uod uol uon uoo uua uuc uun uuu