a-a a-b a-i a-t aaa aab aai aan aao aap aat ab- aba abb abi abn abo abp abt ai- aia aib aii ain aio aip ait an- ana anb ani ann ano anp ant aoa aob aoi aon aoo aop aot ap- apa apb api apn apo app apt at- ata atb ati atn ato atp att b-p baa bab bai ban bao bap bat bba bbb bbi bbn bbo bbp bbt bi- bia bib bii bin bio bip bit bna bnb bni bnn bno bnp bnt boa bob boi bon boo bop bot bpa bpb bpi bpn bpo bpp bpt bta btb bti btn bto btp btt ia- iaa iab iai ian iao iap iat iba ibb ibi ibn ibo ibp ibt iia iib iii iin iio iip iit in- ina inb ini inn ino inp int io- ioa iob ioi ion ioo iop iot ipa ipb ipi ipn ipo ipp ipt ita itb iti itn ito itp itt n-i naa nab nai nan nao nap nat nba nbb nbi nbn nbo nbp nbt nia nib nii nin nio nip nit nna nnb nni nnn nno nnp nnt no- noa nob noi non noo nop not npa npb npi npn npo npp npt nta ntb nti ntn nto ntp ntt o-i oaa oab oai oan oao oap oat ob- oba obb obi obn obo obp obt oia oib oii oin oio oip oit on- ona onb oni onn ono onp ont oo- ooa oob ooi oon ooo oop oot op- opa opb opi opn opo opp opt ot- ota otb oti otn oto otp ott p-p paa pab pai pan pao pap pat pba pbb pbi pbn pbo pbp pbt pia pib pii pin pio pip pit pn- pna pnb pni pnn pno pnp pnt poa pob poi pon poo pop pot ppa ppb ppi ppn ppo ppp ppt pt- pta ptb pti ptn pto ptp ptt taa tab tai tan tao tap tat tba tbb tbi tbn tbo tbp tbt tia tib tii tin tio tip tit tna tnb tni tnn tno tnp tnt to- toa tob toi ton too top tot tpa tpb tpi tpn tpo tpp tpt tta ttb tti ttn tto ttp ttt