a-a a-b a-c a-t aaa aab aac aae aam aao aat aav ab- aba abb abc abe abm abo abt abv ac- aca acb acc ace acm aco act acv aea aeb aec aee aem aeo aet aev ama amb amc ame amm amo amt amv aoa aob aoc aoe aom aoo aot aov at- ata atb atc ate atm ato att atv av- ava avb avc ave avm avo avt baa bab bac bae bam bao bat bav bba bbb bbc bbe bbm bbo bbt bca bcb bcc bce bcm bco bct bcv be- bea beb bec bee bem beo bet bev bma bmb bmc bme bmm bmo bmt bmv boa bob boc boe bom boo bot bov bta btb btc bte btm bto btt btv bva bvb bvc bve bvm bvo bvt bvv c-- caa cab cac cae cam cao cat cav cba cbb cbc cbe cbm cbo cbt cbv cca ccb ccc cce ccm cco cct ccv ce- cea ceb cec cee cem ceo cet cev cma cmb cmc cme cmm cmo cmt cmv co- coa cob coc coe com coo cot cov cta ctb ctc cte ctm cto ctt ctv cva cvb cvc cve cvm cvo cvt cvv eaa eab eac eae eam eao eat eav eba ebb ebc ebe ebm ebo ebt ebv ec- eca ecb ecc ece ecm eco ect ecv eea eeb eec eee eem eeo eet eev em- ema emb emc eme emm emo emt emv eo- eoa eob eoc eoe eom eoo eot eta etb etc ete etm eto ett etv eva evb evc eve evm evo evt evv m-o m-v maa mab mac mae mam mao mat mav mba mbb mbc mbe mbm mbo mbt mbv mc- mca mcb mcc mce mcm mco mct mcv mea meb mec mee mem meo met mev mma mmb mmc mme mmm mmo mmt mmv moa mob moc moe mom moo mot mov mta mtb mtc mte mtm mto mtt mtv mva mvb mvc mve mvm mvo mvt mvv oaa oab oac oae oam oao oat oav ob- oba obb obc obe obm obo obt obv oc- oca ocb occ ocm oco oct ocv oea oeb oec oee oem oeo oet om- oma omb omc ome omm omo omt omv oo- ooa oob ooc oom ooo oot oov ot- ota otb otc ote otm oto ott otv ov- ova ovb ovc ove ovo ovv taa tab tac tae tam tao tat tav tba tbb tbc tbe tbm tbo tbt tbv tca tcb tcc tce tcm tco tct tcv te- tea teb tec tee tem teo tet tev tma tmb tmc tme tmm tmo tmt tmv to- toa tob toc toe tom too tot tov tta ttb ttc tte ttm tto ttt ttv tva tvb tvc tve tvm tvo tvt v-a v-e vaa vab vac vae vam vao vat vav vba vbc vbm vbo vbv vca vcc vce vcm vco vct vea veb vec vee vem veo vet vm- vma vmc vmm vmo vmt voa vob voc voe vom voo vot vov vta vtb vtc vte vtm vto vtt vtv vva vvb vvc vvm vvo vvt vvv