a-a a-b a-t aaa aab aad aae aan aap aat ab- aba abb abd abe abn abp abt ad- ada adb add ade adn adp adt aea aeb aed aee aen aep aet an- ana anb and ane ann anp ant ap- apa apb apd ape apn app apt at- ata atb atd ate atn atp att b-p baa bab bad bae ban bap bat bba bbb bbd bbe bbn bbp bbt bda bdb bdd bde bdp bdt be- bea beb bed bee ben bep bet bna bnb bnd bne bnn bnp bnt bpa bpb bpd bpe bpn bpp bpt bta btb btd bte btn btp btt daa dab dad dae dan dap dat dba dbb dbd dbe dbn dbp dbt dda ddb ddd dde ddn ddp ddt de- dea deb ded dee den dep det dna dnb dnd dne dnn dnp dnt dpa dpb dpd dpe dpn dpp dpt dta dtb dtd dte dtn dtp dtt eaa eab ead eae ean eap eat eba ebb ebd ebe ebn ebp ebt ed- eda edb edd ede edn edp edt eea eeb eed eee een eep eet en- ena enb end ene enn enp ent ep- epa epb epd epe epn epp ept eta etb etd ete etn etp ett naa nab nad nae nan nap nat nba nbb nbd nbe nbn nbp nbt nda ndb ndd nde ndn ndp ndt ne- nea neb ned nee nen nep net nna nnb nne nnn nnp nnt npa npb npd npe npn npp npt nta ntb ntd nte ntn ntp ntt p-p paa pab pad pae pan pap pat pba pbb pbd pbe pbn pbp pbt pda pdb pdd pde pdn pdp pdt pea peb ped pee pen pep pet pn- pna pnb pnd pne pnn pnp pnt ppa ppb ppd ppe ppn ppp ppt pt- pta ptb ptd pte ptn ptp ptt taa tab tad tae tan tap tat tba tbb tbd tbe tbn tbp tbt tda tdb tdd tde tdn tdp tdt te- tea teb ted tee ten tep tet tna tnb tnd tne tnn tnp tnt tpa tpb tpd tpe tpn tpp tpt tta ttb ttd tte ttn ttp ttt