a-a a-b a-c a-t a-z aaa aab aac aae aam aat aau aaz ab- aba abb abc abe abm abt abu abz ac- aca acb acc ace acm act acu acz aea aeb aec aee aem aet aeu aez ama amb amc ame amm amt amu amz at- ata atb atc ate atm att atu atz au- aua aub auc aue aum aut auz az- aza azb aze azm azt azu azz b-u baa bab bac bae bam bat bau baz bba bbb bbc bbe bbm bbt bbu bca bcb bcc bce bcm bct bcu bcz be- bea beb bec bee bem bet beu bez bma bmb bmc bme bmm bmt bmu bmz bta btb btc bte btm btt btu btz bua bub buc bue bum but buu buz bza bze bzu bzz c-- caa cab cac cae cam cat cau caz cba cbb cbc cbe cbm cbt cbu cbz cca ccb ccc cce ccm cct ccu ccz ce- cea ceb cec cee cem cet ceu cez cma cmb cmc cme cmm cmt cmu cta ctb ctc cte ctm ctt ctu ctz cua cub cuc cue cum cut cuu cuz cz- czc cze czm czt eaa eab eac eae eam eat eau eaz eba ebb ebc ebe ebm ebt ebu ec- eca ecb ecc ece ecm ect ecu eea eeb eec eee eem eet em- ema emb emc eme emm emt emu eta etb etc ete etm ett etu etz eu- eua eub euc eue eut eze ezz maa mab mac mae mam mat mau maz mba mbb mbc mbe mbm mbt mbu mc- mca mcb mcc mce mcm mct mcu mcz mea meb mec mee mem met meu mez mma mmb mmc mme mmm mmt mmu mmz mta mtb mtc mte mtm mtt mtu mua mub muc mue mum mut muu mza mzb mzm mzt taa tab tac tae tam tat tau taz tba tbb tbc tbe tbm tbt tbu tbz tca tcb tcc tce tcm tct tcu te- tea teb tec tee tem tet teu tez tma tmb tmc tme tmm tmt tmu tmz tta ttb ttc tte ttm ttt ttu tua tub tuc tue tum tut tuu tuz tza tze tzu ua- uaa uab uac uae uam uat uau uaz uba ubb ubc ube ubt ubu uca ucb ucc uce ucm uct ucu uea ueb uec uee uem uet um- uma umb umc ume umm umt umu uta utb utc ute utm utt utu utz uua uuc uue uum uut uuu uza uzb uzu zaa zab zac zam zat zaz zbb zbc zbm zbt zce zea zeb zec zee zem zet zez zma zmb zmc zmm zmt zta zte ztm zub zuc zum zut zuz zzt zzz