a-a a-b a-c a-t aaa aab aac aad aae aaf aan aao aat aau ab- aba abb abc abd abe abf abn abo abt abu ac- aca acb acc acd ace acf acn aco act acu ad- ada adb adc add ade adf adn ado adt adu aea aeb aec aed aee aef aen aeo aet aeu af- afa afb afc afd afe aff afn afo aft afu an- ana anb anc and ane anf ann ano ant anu aoa aob aoc aod aoe aof aon aoo aot aou at- ata atb atc atd ate atf atn ato att atu au- aua aub auc aud aue auf aun auo aut b-u baa bab bac bad bae baf ban bao bat bau bba bbb bbc bbd bbe bbf bbn bbo bbt bbu bca bcb bcc bcd bce bcf bcn bco bct bcu bda bdb bdc bdd bde bdf bdo bdt bdu be- bea beb bec bed bee bef ben beo bet beu bfa bfb bfc bfd bfe bff bfn bfo bft bfu bna bnb bnc bnd bne bnf bnn bno bnt bnu boa bob boc bod boe bof bon boo bot bou bta btb btc btd bte btf btn bto btt btu bua bub buc bud bue buf bun buo but buu c-- caa cab cac cad cae caf can cao cat cau cba cbb cbc cbd cbe cbf cbn cbo cbt cbu cca ccb ccc ccd cce ccf ccn cco cct ccu cda cdb cdc cdd cde cdf cdn cdo cdt cdu ce- cea ceb cec ced cee cef cen ceo cet ceu cfa cfb cfc cfd cfe cff cfn cfo cft cfu cn- cna cnb cnc cnd cne cnf cnn cno cnt cnu co- coa cob coc cod coe cof con coo cot cou cta ctb ctc ctd cte ctf ctn cto ctt ctu cua cub cuc cud cue cuf cun cuo cut cuu daa dab dac dad dae daf dan dao dat dau dba dbb dbc dbd dbe dbf dbn dbo dbt dbu dca dcb dcc dcd dce dcf dcn dco dct dcu dda ddb ddc ddd dde ddf ddn ddo ddt ddu de- dea deb dec ded dee def den deo det deu dfa dfb dfc dfd dfe dff dfn dfo dft dfu dna dnb dnc dnd dne dnf dnn dno dnt doa dob doc dod doe dof don doo dot dou dta dtb dtc dtd dte dtf dtn dto dtt dtu dua dub duc dud due duf dun duo dut eaa eab eac ead eae eaf ean eao eat eau eba ebb ebc ebd ebe ebf ebn ebo ebt ebu ec- eca ecb ecc ecd ece ecf ecn eco ect ecu ed- eda edb edc edd ede edf edn edo edt edu eea eeb eec eed eee eef een eeo eet ef- efa efb efc efd efe eff efo eft en- ena enb enc end ene enf enn eno ent enu eo- eoa eob eoc eod eoe eof eon eoo eot eou eta etb etc etd ete etf etn eto ett etu eu- eua eub euc eud eue euf eun eut faa fab fac fad fae faf fan fao fat fau fba fbb fbc fbd fbe fbf fbn fbo fbt fbu fca fcb fcc fcd fce fcf fcn fco fct fcu fda fdb fdc fdd fde fdf fdn fdo fdt fdu fea feb fec fed fee fef fen feo fet feu ffa ffc ffd ffe fff ffn ffo fft ffu fna fnb fnc fnd fne fnf fnn fnt fnu foa fob foc foe fof fon foo fot fou fta ftb ftc ftd fte ftf ftn fto ftt ftu fua fub fud fue fuf fun fuo fut fuu naa nab nac nad nae naf nan nao nat nau nba nbb nbc nbd nbe nbf nbn nbo nbt nbu nca ncb ncc ncd nce ncf ncn nco nct ncu nda ndb ndc ndd nde ndf ndn ndo ndt ndu ne- nea neb nec ned nee nef nen neo net neu nfa nfb nfc nfd nfe nff nfn nfo nft nfu nna nnb nnc nne nnf nnn nno nnt nnu no- noa nob noc nod noe nof non noo not nou nta ntb ntc ntd nte ntf ntn nto ntt ntu nua nub nuc nud nue nun nuo nut nuu oaa oab oac oad oae oaf oan oao oat oau ob- oba obb obc obd obe obf obn obo obt obu oc- oca ocb occ ocd ocf ocn oco oct ocu oda odb odc odd ode odf odn odo odt odu oea oeb oec oed oee oef oen oeo oet of- ofa ofb ofc ofd ofe off ofn ofo oft ofu on- ona onb onc ond one onf onn ono ont onu oo- ooa oob ooc ood oof oon ooo oot ot- ota otb otc otd ote otf otn oto ott otu ou- oua ouc oud oue ouf oun ouo out taa tab tac tad tae taf tan tao tat tau tba tbb tbc tbd tbe tbf tbn tbo tbt tbu tca tcb tcc tcd tce tcf tcn tco tct tcu tda tdb tdc tdd tde tdf tdn tdo tdt tdu te- tea teb tec ted tee tef ten teo tet teu tfa tfb tfc tfd tfe tff tfn tfo tft tfu tna tnb tnc tnd tne tnf tnn tno tnt to- toa tob toc tod toe tof ton too tot tou tta ttb ttc ttd tte ttf ttn tto ttt ttu tua tub tuc tud tue tuf tun tuo tut tuu ua- uaa uab uac uad uae uaf uan uao uat uau uba ubb ubc ube ubf ubn ubo ubt ubu uca ucb ucc ucd uce ucf ucn uco uct ucu uda udb udc udd ude udf udn udo udt udu uea ueb uec ued uee uef uen uet ufa ufc ufd ufe uff ufn ufo uft ufu un- una unb unc und une unf unn uno unt unu uoa uob uoc uod uoe uon uoo uot uta utb utc utd ute utf utn uto utt utu uua