a-a a-b a-i a-t aaa aab aad aai aan aao aat ab- aba abb abd abi abn abo abt ad- ada adb add adi adn ado adt ai- aia aib aid aii ain aio ait an- ana anb and ani ann ano ant aoa aob aod aoi aon aoo aot at- ata atb atd ati atn ato att baa bab bad bai ban bao bat bba bbb bbd bbi bbn bbo bbt bda bdb bdd bdi bdo bdt bi- bia bib bid bii bin bio bit bna bnb bnd bni bnn bno bnt boa bob bod boi bon boo bot bta btb btd bti btn bto btt daa dab dad dai dan dao dat dba dbb dbd dbi dbn dbo dbt dda ddb ddd ddi ddn ddo ddt di- dia dib did dii din dio dit dna dnb dnd dni dnn dno dnt doa dob dod doi don doo dot dta dtb dtd dti dtn dto dtt i-d ia- iaa iab iad iai ian iao iat iba ibb ibd ibi ibn ibo ibt ida idb idd idi idn ido idt iia iib iid iii iin iio iit in- ina inb ind ini inn ino int io- ioa iob iod ioi ion ioo iot ita itb itd iti itn ito itt n-i naa nab nad nai nan nao nat nba nbb nbd nbi nbn nbo nbt nda ndb ndd ndi ndn ndo ndt nia nib nid nii nin nio nit nna nnb nni nnn nno nnt no- noa nob nod noi non noo not nta ntb ntd nti ntn nto ntt o-i oaa oab oad oai oan oao oat ob- oba obb obd obi obn obo obt oda odb odd odi odn odo odt oia oib oid oii oin oio oit on- ona onb ond oni onn ono ont oo- ooa oob ood ooi oon ooo oot ot- ota otb otd oti otn oto ott taa tab tad tai tan tao tat tba tbb tbd tbi tbn tbo tbt tda tdb tdd tdi tdn tdo tdt tia tib tid tii tin tio tit tna tnb tnd tni tnn tno tnt to- toa tob tod toi ton too tot tta ttb ttd tti ttn tto ttt