a-a a-b a-i a-t aaa aab aad aai aan aao aar aat ab- aba abb abd abi abn abo abr abt ad- ada adb add adi adn ado adr adt ai- aia aib aid aii ain aio air ait an- ana anb and ani ann ano anr ant aoa aob aod aoi aon aoo aor aot ar- ara arb ard ari arn aro arr art at- ata atb atd ati atn ato atr att baa bab bad bai ban bao bar bat bba bbb bbd bbi bbn bbo bbr bbt bda bdb bdd bdi bdo bdr bdt bi- bia bib bid bii bin bio bir bit bna bnb bnd bni bnn bno bnr bnt boa bob bod boi bon boo bor bot bra brb brd bri brn bro brr brt bta btb btd bti btn bto btr btt daa dab dad dai dan dao dar dat dba dbb dbd dbi dbn dbo dbr dbt dda ddb ddd ddi ddn ddo ddr ddt di- dia dib did dii din dio dir dit dna dnb dnd dni dnn dno dnr dnt doa dob dod doi don doo dor dot dra drb drd dri drn dro drr drt dta dtb dtd dti dtn dto dtr dtt i-d ia- iaa iab iad iai ian iao iar iat iba ibb ibd ibi ibn ibo ibr ibt ida idb idd idi idn ido idr idt iia iib iid iii iin iio iir iit in- ina inb ind ini inn ino inr int io- ioa iob iod ioi ion ioo ior iot ir- ira irb ird iri irn iro irr irt ita itb itd iti itn ito itt n-i naa nab nad nai nan nao nar nat nba nbb nbd nbi nbn nbo nbr nbt nda ndb ndd ndi ndn ndo ndr ndt nia nib nid nii nin nio nir nit nna nnb nni nnn nno nnt no- noa nob nod noi non noo nor not nra nrb nrd nri nrn nro nrr nrt nta ntb ntd nti ntn nto ntr ntt o-i oaa oab oad oai oan oao oar oat ob- oba obb obd obi obn obo obr obt oda odb odd odi odn odo odr odt oia oib oid oii oin oio oir oit on- ona onb ond oni onn ono onr ont oo- ooa oob ood ooi oon ooo oor oot or- ora orb ord ori orn oro orr ort ot- ota otb otd oti otn oto otr ott ra- raa rab rad rai ran rao rar rat rba rbb rbd rbi rbn rbo rbr rbt rda rdb rdd rdi rdn rdo rdr rdt ria rib rid rii rin rio rir rit rna rnb rnd rni rnn rno rnr rnt roa rob rod roi ron roo ror rot rra rrb rrd rri rrn rrr rrt rta rtb rtd rti rtn rto rtr rtt taa tab tad tai tan tao tar tat tba tbb tbd tbi tbn tbo tbr tbt tda tdb tdd tdi tdn tdo tdr tdt tia tib tid tii tin tio tir tit tna tnb tnd tni tnn tno tnr tnt to- toa tob tod toi ton too tor tot tra trb trd tri trn tro trr trt tta ttb ttd tti ttn tto ttr ttt