-al -ol a-a a-b a-i a-t aaa aab aai aal aan aao aat ab- aba abb abi abl abn abo abt ai- aia aib aii ail ain aio ait al- ala alb ali all aln alo alt an- ana anb ani anl ann ano ant aoa aob aoi aol aon aoo aot at- ata atb ati atl atn ato att baa bab bai bal ban bao bat bba bbb bbi bbl bbn bbo bbt bi- bia bib bii bil bin bio bit bla blb bli bll bln blo blt bna bnb bni bnl bnn bno bnt boa bob boi bol bon boo bot bta btb bti btl btn bto btt ia- iaa iab iai ial ian iao iat iba ibb ibi ibl ibn ibo ibt iia iib iii iil iin iio iit il- ila ilb ili ill iln ilo ilt in- ina inb ini inl inn ino int io- ioa iob ioi iol ion ioo iot ita itb iti itl itn ito itt la- laa lab lai lal lan lao lat lba lbb lbi lbl lbo lbt lia lib lii lil lin lio lit lla llb lli lll lln llo llt lna lnb lni lnl lnn lno lnt loa lob loi lol lon loo lot lta ltb lti ltl lto ltt n-i naa nab nai nal nan nao nat nba nbb nbi nbl nbn nbo nbt nia nib nii nil nin nio nit nla nlb nli nll nln nlo nlt nna nnb nni nnl nnn nno nnt no- noa nob noi nol non noo not nta ntb nti ntn nto ntt o-i oaa oab oai oal oan oao oat ob- oba obb obi obl obn obo obt oia oib oii oil oin oio oit ola olb oli oll oln olo olt on- ona onb oni onl onn ono ont oo- ooa oob ooi ool oon ooo oot ot- ota otb oti otl otn oto ott taa tab tai tal tan tao tat tba tbb tbi tbl tbn tbo tbt tia tib tii til tin tio tit tla tli tll tln tlo tlt tna tnb tni tnl tnn tno tnt to- toa tob toi tol ton too tot tta ttb tti ttl ttn tto ttt