a-a a-b a-i a-t aaa aab aad aai aan aar aat ab- aba abb abd abi abn abr abt ad- ada adb add adi adn adr adt ai- aia aib aid aii ain air ait an- ana anb and ani ann anr ant ar- ara arb ard ari arn arr art at- ata atb atd ati atn atr att baa bab bad bai ban bar bat bba bbb bbd bbi bbn bbr bbt bda bdb bdd bdi bdr bdt bi- bia bib bid bii bin bir bit bna bnb bnd bni bnn bnr bnt bra brb brd bri brn brr brt bta btb btd bti btn btr btt daa dab dad dai dan dar dat dba dbb dbd dbi dbn dbr dbt dda ddb ddd ddi ddn ddr ddt di- dia dib did dii din dir dit dna dnb dnd dni dnn dnr dnt dra drb drd dri drn drr drt dta dtb dtd dti dtn dtr dtt i-d ia- iaa iab iad iai ian iar iat iba ibb ibd ibi ibn ibr ibt ida idb idd idi idn idr idt iia iib iid iii iin iir iit in- ina inb ind ini inn inr int ir- ira irb ird iri irn irr irt ita itb itd iti itn itt n-i naa nab nad nai nan nar nat nba nbb nbd nbi nbn nbr nbt nda ndb ndd ndi ndn ndr ndt nia nib nid nii nin nir nit nna nnb nni nnn nnt nra nrb nrd nri nrn nrr nrt nta ntb ntd nti ntn ntr ntt ra- raa rab rad rai ran rar rat rba rbb rbd rbi rbn rbr rbt rda rdb rdd rdi rdn rdr rdt ria rib rid rii rin rir rit rna rnb rnd rni rnn rnr rnt rra rrb rrd rri rrn rrr rrt rta rtb rtd rti rtn rtr rtt taa tab tad tai tan tar tat tba tbb tbd tbi tbn tbr tbt tda tdb tdd tdi tdn tdr tdt tia tib tid tii tin tir tit tna tnb tnd tni tnn tnr tnt tra trb trd tri trn trr trt tta ttb ttd tti ttn ttr ttt