a-a a-b a-c a-t aaa aab aac aad aae aan aao aat aau ab- aba abb abc abd abe abn abo abt abu ac- aca acb acc acd ace acn aco act acu ad- ada adb adc add ade adn ado adt adu aea aeb aec aed aee aen aeo aet aeu an- ana anb anc and ane ann ano ant anu aoa aob aoc aod aoe aon aoo aot aou at- ata atb atc atd ate atn ato att atu au- aua aub auc aud aue aun auo aut b-u baa bab bac bad bae ban bao bat bau bba bbb bbc bbd bbe bbn bbo bbt bbu bca bcb bcc bcd bce bcn bco bct bcu bda bdb bdc bdd bde bdo bdt bdu be- bea beb bec bed bee ben beo bet beu bna bnb bnc bnd bne bnn bno bnt bnu boa bob boc bod boe bon boo bot bou bta btb btc btd bte btn bto btt btu bua bub buc bud bue bun buo but buu c-- caa cab cac cad cae can cao cat cau cba cbb cbc cbd cbe cbn cbo cbt cbu cca ccb ccc ccd cce ccn cco cct ccu cda cdb cdc cdd cde cdn cdo cdt cdu ce- cea ceb cec ced cee cen ceo cet ceu cn- cna cnb cnc cnd cne cnn cno cnt cnu co- coa cob coc cod coe con coo cot cou cta ctb ctc ctd cte ctn cto ctt ctu cua cub cuc cud cue cun cuo cut cuu daa dab dac dad dae dan dao dat dau dba dbb dbc dbd dbe dbn dbo dbt dbu dca dcb dcc dcd dce dcn dco dct dcu dda ddb ddc ddd dde ddn ddo ddt ddu de- dea deb dec ded dee den deo det deu dna dnb dnc dnd dne dnn dno dnt doa dob doc dod doe don doo dot dou dta dtb dtc dtd dte dtn dto dtt dtu dua dub duc dud due dun duo dut eaa eab eac ead eae ean eao eat eau eba ebb ebc ebd ebe ebn ebo ebt ebu ec- eca ecb ecc ecd ece ecn eco ect ecu ed- eda edb edc edd ede edn edo edt edu eea eeb eec eed eee een eeo eet en- ena enb enc end ene enn eno ent enu eo- eoa eob eoc eod eoe eon eoo eot eou eta etb etc etd ete etn eto ett etu eu- eua eub euc eud eue eun eut naa nab nac nad nae nan nao nat nau nba nbb nbc nbd nbe nbn nbo nbt nbu nca ncb ncc ncd nce ncn nco nct ncu nda ndb ndc ndd nde ndn ndo ndt ndu ne- nea neb nec ned nee nen neo net neu nna nnb nnc nne nnn nno nnt nnu no- noa nob noc nod noe non noo not nou nta ntb ntc ntd nte ntn nto ntt ntu nua nub nuc nud nue nun nuo nut nuu oaa oab oac oad oae oan oao oat oau ob- oba obb obc obd obe obn obo obt obu oc- oca ocb occ ocd ocn oco oct ocu oda odb odc odd ode odn odo odt odu oea oeb oec oed oee oen oeo oet on- ona onb onc ond one onn ono ont onu oo- ooa oob ooc ood oon ooo oot ot- ota otb otc otd ote otn oto ott otu ou- oua ouc oud oue oun ouo out taa tab tac tad tae tan tao tat tau tba tbb tbc tbd tbe tbn tbo tbt tbu tca tcb tcc tcd tce tcn tco tct tcu tda tdb tdc tdd tde tdn tdo tdt tdu te- tea teb tec ted tee ten teo tet teu tna tnb tnc tnd tne tnn tno tnt to- toa tob toc tod toe ton too tot tou tta ttb ttc ttd tte ttn tto ttt ttu tua tub tuc tud tue tun tuo tut tuu ua- uaa uab uac uad uae uan uao uat uau uba ubb ubc ube ubn ubo ubt ubu uca ucb ucc ucd uce ucn uco uct ucu uda udb udc udd ude udn udo udt udu uea ueb uec ued uee uen uet un- una unb unc und une unn uno unt unu uoa uob uoc uod uoe uon uoo uot uta utb utc utd ute utn uto utt utu uua uuc uue uun uut uuu