a-a a-b a-t aaa aab aad aae aan aao aap aat ab- aba abb abd abe abn abo abp abt ad- ada adb add ade adn ado adp adt aea aeb aed aee aen aeo aep aet an- ana anb and ane ann ano anp ant aoa aob aod aoe aon aoo aop aot ap- apa apb apd ape apn apo app apt at- ata atb atd ate atn ato atp att b-p baa bab bad bae ban bao bap bat bba bbb bbd bbe bbn bbo bbp bbt bda bdb bdd bde bdo bdp bdt be- bea beb bed bee ben beo bep bet bna bnb bnd bne bnn bno bnp bnt boa bob bod boe bon boo bop bot bpa bpb bpd bpe bpn bpo bpp bpt bta btb btd bte btn bto btp btt daa dab dad dae dan dao dap dat dba dbb dbd dbe dbn dbo dbp dbt dda ddb ddd dde ddn ddo ddp ddt de- dea deb ded dee den deo dep det dna dnb dnd dne dnn dno dnp dnt doa dob dod doe don doo dop dot dpa dpb dpd dpe dpn dpo dpp dpt dta dtb dtd dte dtn dto dtp dtt eaa eab ead eae ean eao eap eat eba ebb ebd ebe ebn ebo ebp ebt ed- eda edb edd ede edn edo edp edt eea eeb eed eee een eeo eep eet en- ena enb end ene enn eno enp ent eo- eoa eob eod eoe eon eoo eop eot ep- epa epb epd epe epn epo epp ept eta etb etd ete etn eto etp ett naa nab nad nae nan nao nap nat nba nbb nbd nbe nbn nbo nbp nbt nda ndb ndd nde ndn ndo ndp ndt ne- nea neb ned nee nen neo nep net nna nnb nne nnn nno nnp nnt no- noa nob nod noe non noo nop not npa npb npd npe npn npo npp npt nta ntb ntd nte ntn nto ntp ntt oaa oab oad oae oan oao oap oat ob- oba obb obd obe obn obo obp obt oda odb odd ode odn odo odp odt oea oeb oed oee oen oeo oep oet on- ona onb ond one onn ono onp ont oo- ooa oob ood oon ooo oop oot op- opa opb opd ope opn opo opp opt ot- ota otb otd ote otn oto otp ott p-p paa pab pad pae pan pao pap pat pba pbb pbd pbe pbn pbo pbp pbt pda pdb pdd pde pdn pdo pdp pdt pea peb ped pee pen peo pep pet pn- pna pnb pnd pne pnn pno pnp pnt poa pob pod poe pon poo pop pot ppa ppb ppd ppe ppn ppo ppp ppt pt- pta ptb ptd pte ptn pto ptp ptt taa tab tad tae tan tao tap tat tba tbb tbd tbe tbn tbo tbp tbt tda tdb tdd tde tdn tdo tdp tdt te- tea teb ted tee ten teo tep tet tna tnb tnd tne tnn tno tnp tnt to- toa tob tod toe ton too top tot tpa tpb tpd tpe tpn tpo tpp tpt tta ttb ttd tte ttn tto ttp ttt