a-a a-b a-i a-t aaa aab aad aai aan aar aat aax ab- aba abb abd abi abn abr abt abx ad- ada adb add adi adn adr adt adx ai- aia aib aid aii ain air ait aix an- ana anb and ani ann anr ant anx ar- ara arb ard ari arn arr art arx at- ata atb atd ati atn atr att atx ax- axa axi axn axr axt axx baa bab bad bai ban bar bat bax bba bbb bbd bbi bbn bbr bbt bbx bda bdb bdd bdi bdr bdt bdx bi- bia bib bid bii bin bir bit bix bna bnb bnd bni bnn bnr bnt bnx bra brb brd bri brn brr brt brx bta btb btd bti btn btr btt btx bxb bxd bxi bxn bxx daa dab dad dai dan dar dat dax dba dbb dbd dbi dbn dbr dbt dbx dda ddb ddd ddi ddn ddr ddt ddx di- dia dib did dii din dir dit dix dna dnb dnd dni dnn dnr dnt dra drb drd dri drn drr drt drx dta dtb dtd dti dtn dtr dtt dtx dxd dxi dxn dxr dxt dxx i-d ia- iaa iab iad iai ian iar iat iba ibb ibd ibi ibn ibr ibt ibx ida idb idd idi idn idr idt idx iia iib iid iii iin iir iit iix in- ina inb ind ini inn inr int inx ir- ira irb ird iri irn irr irt irx ita itb itd iti itn itt itx ixi ixn n-i naa nab nad nai nan nar nat nax nba nbb nbd nbi nbn nbr nbt nbx nda ndb ndd ndi ndn ndr ndt nia nib nid nii nin nir nit nix nna nnb nni nnn nnt nra nrb nrd nri nrn nrr nrt nrx nta ntb ntd nti ntn ntr ntt ntx nxd nxt ra- raa rab rad rai ran rar rat rax rba rbb rbd rbi rbn rbr rbt rbx rda rdb rdd rdi rdn rdr rdt rdx ria rib rid rii rin rir rit rix rna rnb rnd rni rnn rnr rnt rra rrb rrd rri rrn rrr rrt rta rtb rtd rti rtn rtr rtt rtx rxr t-x taa tab tad tai tan tar tat tax tba tbb tbd tbi tbn tbr tbt tda tdb tdd tdi tdn tdr tdt tdx tia tib tid tii tin tir tit tix tna tnb tnd tni tnn tnr tnt tnx tra trb trd tri trn trr trt trx tta ttb ttd tti ttn ttr ttt ttx txi txn txt xaa xad xan xar xat xbr xbx xda xdb xdi xdr xdt xia xii xin xit xix xna xrd xrt xrx xti xtr xtx xxi xxx