a-a a-b a-t aaa aab aae aam aao aat aax ab- aba abb abe abm abo abt abx aea aeb aee aem aeo aet aex ama amb ame amm amo amt amx aoa aob aoe aom aoo aot aox at- ata atb ate atm ato att atx ax- axa axe axm axo axt axx baa bab bae bam bao bat bax bba bbb bbe bbm bbo bbt bbx be- bea beb bee bem beo bet bex bma bmb bme bmm bmo bmt bmx boa bob boe bom boo bot box bta btb bte btm bto btt btx bxb bxm bxo bxx eaa eab eae eam eao eat eax eba ebb ebe ebm ebo ebt ebx eea eeb eee eem eeo eet eex em- ema emb eme emm emo emt emx eo- eoa eob eoe eom eoo eot eta etb ete etm eto ett etx ex- exa exe exo ext exx m-o maa mab mae mam mao mat max mba mbb mbe mbm mbo mbt mbx mea meb mee mem meo met mex mma mmb mme mmm mmo mmt mmx moa mob moe mom moo mot mox mta mtb mte mtm mto mtt mtx mxa oaa oab oae oam oao oat oax ob- oba obb obe obm obo obt obx oea oeb oee oem oeo oet oex om- oma omb ome omm omo omt omx oo- ooa oob oom ooo oot oox ot- ota otb ote otm oto ott ox- oxa oxb oxo oxt oxx t-x taa tab tae tam tao tat tax tba tbb tbe tbm tbo tbt te- tea teb tee tem teo tet tex tma tmb tme tmm tmo tmt tmx to- toa tob toe tom too tot tox tta ttb tte ttm tto ttt ttx txe txt xaa xam xat xbe xbx xee xem xet xex xma xmm xmo xmt xmx xoa xom xoo xot xox xtm xtx xxo xxx