a-a a-b a-c a-t aaa aab aac aae aam aan aat aau ab- aba abb abc abe abm abn abt abu ac- aca acb acc ace acm acn act acu aea aeb aec aee aem aen aet aeu ama amb amc ame amm amn amt amu an- ana anb anc ane anm ann ant anu at- ata atb atc ate atm atn att atu au- aua aub auc aue aum aun aut b-u baa bab bac bae bam ban bat bau bba bbb bbc bbe bbm bbn bbt bbu bca bcb bcc bce bcm bcn bct bcu be- bea beb bec bee bem ben bet beu bma bmb bmc bme bmm bmn bmt bmu bna bnb bnc bne bnn bnt bnu bta btb btc bte btm btn btt btu bua bub buc bue bum bun but buu c-- caa cab cac cae cam can cat cau cba cbb cbc cbe cbm cbn cbt cbu cca ccb ccc cce ccm ccn cct ccu ce- cea ceb cec cee cem cen cet ceu cma cmb cmc cme cmm cmn cmt cmu cn- cna cnb cnc cne cnm cnn cnt cnu cta ctb ctc cte ctm ctn ctt ctu cua cub cuc cue cum cun cut cuu eaa eab eac eae eam ean eat eau eba ebb ebc ebe ebm ebn ebt ebu ec- eca ecb ecc ece ecm ecn ect ecu eea eeb eec eee eem een eet em- ema emb emc eme emm emn emt emu en- ena enb enc ene enm enn ent enu eta etb etc ete etm etn ett etu eu- eua eub euc eue eun eut maa mab mac mae mam man mat mau mba mbb mbc mbe mbm mbt mbu mc- mca mcb mcc mce mcm mcn mct mcu mea meb mec mee mem men met meu mma mmb mmc mme mmm mmn mmt mmu mna mnb mnc mne mnm mnn mnt mnu mta mtb mtc mte mtm mtn mtt mtu mua mub muc mue mum mun mut muu naa nab nac nae nam nan nat nau nba nbb nbc nbe nbm nbn nbt nbu nca ncb ncc nce ncm ncn nct ncu ne- nea neb nec nee nem nen net neu nma nmb nmc nme nmm nmn nmt nmu nna nnb nnc nne nnm nnn nnt nnu nta ntb ntc nte ntm ntn ntt ntu nua nub nuc nue num nun nut nuu taa tab tac tae tam tan tat tau tba tbb tbc tbe tbm tbn tbt tbu tca tcb tcc tce tcm tcn tct tcu te- tea teb tec tee tem ten tet teu tma tmb tmc tme tmm tmn tmt tmu tna tnb tnc tne tnm tnn tnt tta ttb ttc tte ttm ttn ttt ttu tua tub tuc tue tum tun tut tuu ua- uaa uab uac uae uam uan uat uau uba ubb ubc ube ubn ubt ubu uca ucb ucc uce ucm ucn uct ucu uea ueb uec uee uem uen uet um- uma umb umc ume umm umn umt umu un- una unb unc une unm unn unt unu uta utb utc ute utm utn utt utu uua uuc uue uum uun uut uuu