a-a a-b a-i a-t aaa aab aai aan aao aap aat aax ab- aba abb abi abn abo abp abt abx ai- aia aib aii ain aio aip ait aix an- ana anb ani ann ano anp ant anx aoa aob aoi aon aoo aop aot aox ap- apa apb api apn apo app apt apx at- ata atb ati atn ato atp att atx ax- axa axi axn axo axp axt axx b-p baa bab bai ban bao bap bat bax bba bbb bbi bbn bbo bbp bbt bbx bi- bia bib bii bin bio bip bit bix bna bnb bni bnn bno bnp bnt bnx boa bob boi bon boo bop bot box bpa bpb bpi bpn bpo bpp bpt bpx bta btb bti btn bto btp btt btx bxb bxi bxn bxo bxx ia- iaa iab iai ian iao iap iat iba ibb ibi ibn ibo ibp ibt ibx iia iib iii iin iio iip iit iix in- ina inb ini inn ino inp int inx io- ioa iob ioi ion ioo iop iot ipa ipb ipi ipn ipo ipp ipt ipx ita itb iti itn ito itp itt itx ixi ixn n-i naa nab nai nan nao nap nat nax nba nbb nbi nbn nbo nbp nbt nbx nia nib nii nin nio nip nit nix nna nnb nni nnn nno nnp nnt no- noa nob noi non noo nop not nox npa npb npi npn npo npp npt nta ntb nti ntn nto ntp ntt ntx nxt o-i oaa oab oai oan oao oap oat oax ob- oba obb obi obn obo obp obt obx oia oib oii oin oio oip oit on- ona onb oni onn ono onp ont onx oo- ooa oob ooi oon ooo oop oot oox op- opa opb opi opn opo opp opt opx ot- ota otb oti otn oto otp ott ox- oxa oxb oxi oxn oxo oxt oxx p-p paa pab pai pan pao pap pat pax pba pbb pbi pbn pbo pbp pbt pbx pia pib pii pin pio pip pit pix pn- pna pnb pni pnn pno pnp pnt pnx poa pob poi pon poo pop pot pox ppa ppb ppi ppn ppo ppp ppt ppx pt- pta ptb pti ptn pto ptp ptt ptx pxt t-x taa tab tai tan tao tap tat tax tba tbb tbi tbn tbo tbp tbt tia tib tii tin tio tip tit tix tna tnb tni tnn tno tnp tnt tnx to- toa tob toi ton too top tot tox tpa tpb tpi tpn tpo tpp tpt tpx tta ttb tti ttn tto ttp ttt ttx txi txn txt xaa xan xap xat xbx xia xii xin xio xit xix xna xno xoa xoi xon xoo xop xot xox xpa xpb xpn xpo xpp xpt xti xtp xtx xxi xxo xxp xxx