a-a a-b a-c a-t aaa aab aac aad aae aan aat aau ab- aba abb abc abd abe abn abt abu ac- aca acb acc acd ace acn act acu ad- ada adb adc add ade adn adt adu aea aeb aec aed aee aen aet aeu an- ana anb anc and ane ann ant anu at- ata atb atc atd ate atn att atu au- aua aub auc aud aue aun aut b-u baa bab bac bad bae ban bat bau bba bbb bbc bbd bbe bbn bbt bbu bca bcb bcc bcd bce bcn bct bcu bda bdb bdc bdd bde bdt bdu be- bea beb bec bed bee ben bet beu bna bnb bnc bnd bne bnn bnt bnu bta btb btc btd bte btn btt btu bua bub buc bud bue bun but buu c-- caa cab cac cad cae can cat cau cba cbb cbc cbd cbe cbn cbt cbu cca ccb ccc ccd cce ccn cct ccu cda cdb cdc cdd cde cdn cdt cdu ce- cea ceb cec ced cee cen cet ceu cn- cna cnb cnc cnd cne cnn cnt cnu cta ctb ctc ctd cte ctn ctt ctu cua cub cuc cud cue cun cut cuu daa dab dac dad dae dan dat dau dba dbb dbc dbd dbe dbn dbt dbu dca dcb dcc dcd dce dcn dct dcu dda ddb ddc ddd dde ddn ddt ddu de- dea deb dec ded dee den det deu dna dnb dnc dnd dne dnn dnt dta dtb dtc dtd dte dtn dtt dtu dua dub duc dud due dun dut eaa eab eac ead eae ean eat eau eba ebb ebc ebd ebe ebn ebt ebu ec- eca ecb ecc ecd ece ecn ect ecu ed- eda edb edc edd ede edn edt edu eea eeb eec eed eee een eet en- ena enb enc end ene enn ent enu eta etb etc etd ete etn ett etu eu- eua eub euc eud eue eun eut naa nab nac nad nae nan nat nau nba nbb nbc nbd nbe nbn nbt nbu nca ncb ncc ncd nce ncn nct ncu nda ndb ndc ndd nde ndn ndt ndu ne- nea neb nec ned nee nen net neu nna nnb nnc nne nnn nnt nnu nta ntb ntc ntd nte ntn ntt ntu nua nub nuc nud nue nun nut nuu taa tab tac tad tae tan tat tau tba tbb tbc tbd tbe tbn tbt tbu tca tcb tcc tcd tce tcn tct tcu tda tdb tdc tdd tde tdn tdt tdu te- tea teb tec ted tee ten tet teu tna tnb tnc tnd tne tnn tnt tta ttb ttc ttd tte ttn ttt ttu tua tub tuc tud tue tun tut tuu ua- uaa uab uac uad uae uan uat uau uba ubb ubc ube ubn ubt ubu uca ucb ucc ucd uce ucn uct ucu uda udb udc udd ude udn udt udu uea ueb uec ued uee uen uet un- una unb unc und une unn unt unu uta utb utc utd ute utn utt utu uua uuc uue uun uut uuu