-al -ol a-a a-b a-i aaa aab aaf aag aai aal aan aao ab- aba abb abf abg abi abl abn abo af- afa afb aff afg afi afl afn afo ag- aga agb agf agg agi agl agn ago ai- aia aib aif aig aii ail ain aio al- ala alb alf alg ali all aln alo an- ana anb anf ang ani anl ann ano aoa aob aof aog aoi aol aon aoo baa bab baf bag bai bal ban bao bba bbb bbf bbg bbi bbl bbn bbo bfa bfb bff bfg bfi bfl bfn bfo bga bgb bgf bgg bgi bgl bgn bgo bi- bia bib bif big bii bil bin bio bla blb blf blg bli bll bln blo bna bnb bnf bng bni bnl bnn bno boa bob bof bog boi bol bon boo faa fab faf fag fai fal fan fao fba fbb fbf fbg fbi fbl fbn fbo ffa fff ffg ffi ffl ffn ffo fga fgb fgf fgg fgi fgl fgn fia fib fif fig fii fil fin fla flb flf flg fli fll fln flo fna fnb fnf fng fni fnl fnn foa fob fof fog foi fol fon foo gaa gab gaf gag gai gal gan gao gba gbf gbg gbi gbl gbn gbo gfa gfb gff gfi gfl gfo gga ggb ggg ggi ggn ggo gia gib gif gig gii gil gin gio gla glb glf glg gli gll gln glo gna gnb gnf gni gnl gnn gno goa gob gof gog goi gol gon goo i-f ia- iaa iab iaf iag iai ial ian iao iba ibb ibf ibg ibi ibl ibn ibo ifa ifb iff ifg ifi ifl ifn ifo iga igb igf igg igi igl ign igo iia iib iif iii iil iin iio il- ila ilb ilf ilg ili ill iln ilo in- ina inb inf ing ini inl inn ino io- ioa iob iof iog ioi iol ion ioo la- laa lab laf lag lai lal lan lao lba lbb lbf lbg lbi lbl lbo lfa lfb lff lfg lfi lfl lfn lfo lga lgb lgf lgg lgi lgl lgn lgo lia lib lif lig lii lil lin lio lla llb llf llg lli lll lln llo lna lnb lng lni lnl lnn lno loa lob lof log loi lol lon loo n-i naa nab naf nag nai nal nan nao nba nbb nbf nbg nbi nbl nbn nbo nfa nfb nff nfi nfl nfn nfo nga ngb ngf ngg ngi ngl ngn ngo nia nib nif nig nii nil nin nio nla nlb nlf nlg nli nll nln nlo nna nnb nnf nng nni nnl nnn nno no- noa nob nof nog noi nol non noo o-i oaa oab oaf oag oai oal oan oao ob- oba obb obf obg obi obl obn obo of- ofa ofb off ofg ofi ofl ofn ofo oga ogf ogg ogi ogl ogn ogo oia oib oif oii oil oin oio ola olb olf olg oli oll oln olo on- ona onb onf ong oni onl onn ono oo- ooa oob oof oog ooi ool oon ooo