a-a a-b a-t aaa aab aad aae aan aao aap aas aat ab- aba abb abd abe abn abo abp abs abt ad- ada adb add ade adn ado adp ads adt aea aeb aed aee aen aeo aep aes aet an- ana anb and ane ann ano anp ans ant aoa aob aod aoe aon aoo aop aos aot ap- apa apb apd ape apn apo app aps apt as- asa asb asd ase asn aso asp ass ast at- ata atb atd ate atn ato atp ats att b-p baa bab bad bae ban bao bap bas bat bba bbb bbd bbe bbn bbo bbp bbs bbt bda bdb bdd bde bdo bdp bds bdt be- bea beb bed bee ben beo bep bes bet bna bnb bnd bne bnn bno bnp bns bnt boa bob bod boe bon boo bop bos bot bpa bpb bpd bpe bpn bpo bpp bps bpt bsa bsb bsd bse bsn bso bsp bss bst bta btb btd bte btn bto btp bts btt daa dab dad dae dan dao dap das dat dba dbb dbd dbe dbn dbo dbp dbs dbt dda ddb ddd dde ddn ddo ddp dds ddt de- dea deb ded dee den deo dep des det dna dnb dnd dne dnn dno dnp dns dnt doa dob dod doe don doo dop dos dot dpa dpb dpd dpe dpn dpo dpp dps dpt dsa dsb dsd dse dsn dso dsp dss dst dta dtb dtd dte dtn dto dtp dts dtt eaa eab ead eae ean eao eap eas eat eba ebb ebd ebe ebn ebo ebp ebs ebt ed- eda edb edd ede edn edo edp eds edt eea eeb eed eee een eeo eep ees eet en- ena enb end ene enn eno enp ens ent eo- eoa eob eod eoe eon eoo eop eos eot ep- epa epb epd epe epn epo epp eps ept es- esa esb esd ese esn eso esp ess est eta etb etd ete etn eto etp ets ett naa nab nad nae nan nao nap nas nat nba nbb nbd nbe nbn nbo nbp nbs nbt nda ndb ndd nde ndn ndo ndp nds ndt ne- nea neb ned nee nen neo nep nes net nna nnb nne nnn nno nnp nns nnt no- noa nob nod noe non noo nop nos not npa npb npd npe npn npo npp nps npt nsa nsb nsd nse nsn nso nsp nss nst nta ntb ntd nte ntn nto ntp nts ntt oaa oab oad oae oan oao oap oas oat ob- oba obb obd obe obn obo obp obs obt oda odb odd ode odn odo odp ods odt oea oeb oed oee oen oeo oep oes oet on- ona onb ond one onn ono onp ons ont oo- ooa oob ood oon ooo oop oos oot op- opa opb opd ope opn opo opp ops opt os- osa osb osd ose osn oso osp oss ost ot- ota otb otd ote otn oto otp ots ott p-p paa pab pad pae pan pao pap pas pat pba pbb pbd pbe pbn pbo pbp pbs pbt pda pdb pdd pde pdn pdo pdp pds pdt pea peb ped pee pen peo pep pes pet pn- pna pnb pnd pne pnn pno pnp pns pnt poa pob pod poe pon poo pop pos pot ppa ppb ppd ppe ppn ppo ppp pps ppt ps- psa psb psd pse psn pso psp pss pst pt- pta ptb ptd pte ptn pto ptp pts ptt saa sab sad sae san sao sap sas sat sba sbb sbd sbe sbn sbo sbp sbs sbt sda sdb sdd sde sdn sdo sdp sds sdt se- sea seb sed see sen seo sep ses set sna snb snd sne snn sno snp sns snt soa sob sod soe son soo sop sos sot spa spb spd spe spn spo spp sps spt ss- ssa ssb ssd sse ssn sso ssp sss sst sta stb std ste stn sto stp sts stt taa tab tad tae tan tao tap tas tat tba tbb tbd tbe tbn tbo tbp tbs tbt tda tdb tdd tde tdn tdo tdp tds tdt te- tea teb ted tee ten teo tep tes tet tna tnb tnd tne tnn tno tnp tns tnt to- toa tob tod toe ton too top tos tot tpa tpb tpd tpe tpn tpo tpp tps tpt tsa tsb tsd tse tsn tso tsp tss tst tta ttb ttd tte ttn tto ttp tts ttt