a-a a-b a-c a-t aaa aab aac aae aam aao aat aau ab- aba abb abc abe abm abo abt abu ac- aca acb acc ace acm aco act acu aea aeb aec aee aem aeo aet aeu ama amb amc ame amm amo amt amu aoa aob aoc aoe aom aoo aot aou at- ata atb atc ate atm ato att atu au- aua aub auc aue aum auo aut b-u baa bab bac bae bam bao bat bau bba bbb bbc bbe bbm bbo bbt bbu bca bcb bcc bce bcm bco bct bcu be- bea beb bec bee bem beo bet beu bma bmb bmc bme bmm bmo bmt bmu boa bob boc boe bom boo bot bou bta btb btc bte btm bto btt btu bua bub buc bue bum buo but buu c-- caa cab cac cae cam cao cat cau cba cbb cbc cbe cbm cbo cbt cbu cca ccb ccc cce ccm cco cct ccu ce- cea ceb cec cee cem ceo cet ceu cma cmb cmc cme cmm cmo cmt cmu co- coa cob coc coe com coo cot cou cta ctb ctc cte ctm cto ctt ctu cua cub cuc cue cum cuo cut cuu eaa eab eac eae eam eao eat eau eba ebb ebc ebe ebm ebo ebt ebu ec- eca ecb ecc ece ecm eco ect ecu eea eeb eec eee eem eeo eet em- ema emb emc eme emm emo emt emu eo- eoa eob eoc eoe eom eoo eot eou eta etb etc ete etm eto ett etu eu- eua eub euc eue eut m-o maa mab mac mae mam mao mat mau mba mbb mbc mbe mbm mbo mbt mbu mc- mca mcb mcc mce mcm mco mct mcu mea meb mec mee mem meo met meu mma mmb mmc mme mmm mmo mmt mmu moa mob moc moe mom moo mot mou mta mtb mtc mte mtm mto mtt mtu mua mub muc mue mum mut muu oaa oab oac oae oam oao oat oau ob- oba obb obc obe obm obo obt obu oc- oca ocb occ ocm oco oct ocu oea oeb oec oee oem oeo oet om- oma omb omc ome omm omo omt omu oo- ooa oob ooc oom ooo oot ot- ota otb otc ote otm oto ott otu ou- oua ouc oue oum ouo out taa tab tac tae tam tao tat tau tba tbb tbc tbe tbm tbo tbt tbu tca tcb tcc tce tcm tco tct tcu te- tea teb tec tee tem teo tet teu tma tmb tmc tme tmm tmo tmt tmu to- toa tob toc toe tom too tot tou tta ttb ttc tte ttm tto ttt ttu tua tub tuc tue tum tuo tut tuu ua- uaa uab uac uae uam uao uat uau uba ubb ubc ube ubo ubt ubu uca ucb ucc uce ucm uco uct ucu uea ueb uec uee uem uet um- uma umb umc ume umm umo umt umu uoa uob uoc uoe uom uoo uot uta utb utc ute utm uto utt utu uua uuc uue uum uut uuu