-al -ol a-a a-b a-i aaa aab aaf aai aal aan aao ab- aba abb abf abi abl abn abo af- afa afb aff afi afl afn afo ai- aia aib aif aii ail ain aio al- ala alb alf ali all aln alo an- ana anb anf ani anl ann ano aoa aob aof aoi aol aon aoo baa bab baf bai bal ban bao bba bbb bbf bbi bbl bbn bbo bfa bfb bff bfi bfl bfn bfo bi- bia bib bif bii bil bin bio bla blb blf bli bll bln blo bna bnb bnf bni bnl bnn bno boa bob bof boi bol bon boo faa fab faf fai fal fan fao fba fbb fbf fbi fbl fbn fbo ffa fff ffi ffl ffn ffo fia fib fif fii fil fin fla flb flf fli fll fln flo fna fnb fnf fni fnl fnn foa fob fof foi fol fon foo i-f ia- iaa iab iaf iai ial ian iao iba ibb ibf ibi ibl ibn ibo ifa ifb iff ifi ifl ifn ifo iia iib iif iii iil iin iio il- ila ilb ilf ili ill iln ilo in- ina inb inf ini inl inn ino io- ioa iob iof ioi iol ion ioo la- laa lab laf lai lal lan lao lba lbb lbf lbi lbl lbo lfa lfb lff lfi lfl lfn lfo lia lib lif lii lil lin lio lla llb llf lli lll lln llo lna lnb lni lnl lnn lno loa lob lof loi lol lon loo n-i naa nab naf nai nal nan nao nba nbb nbf nbi nbl nbn nbo nfa nfb nff nfi nfl nfn nfo nia nib nif nii nil nin nio nla nlb nlf nli nll nln nlo nna nnb nnf nni nnl nnn nno no- noa nob nof noi nol non noo o-i oaa oab oaf oai oal oan oao ob- oba obb obf obi obl obn obo of- ofa ofb off ofi ofl ofn ofo oia oib oif oii oil oin oio ola olb olf oli oll oln olo on- ona onb onf oni onl onn ono oo- ooa oob oof ooi ool oon ooo