a-a a-b a-t aaa aab aad aae aam aao aat ab- aba abb abd abe abm abo abt ad- ada adb add ade adm ado adt aea aeb aed aee aem aeo aet ama amb amd ame amm amo amt aoa aob aod aoe aom aoo aot at- ata atb atd ate atm ato att baa bab bad bae bam bao bat bba bbb bbd bbe bbm bbo bbt bda bdb bdd bde bdm bdo bdt be- bea beb bed bee bem beo bet bma bmb bmd bme bmm bmo bmt boa bob bod boe bom boo bot bta btb btd bte btm bto btt daa dab dad dae dam dao dat dba dbb dbd dbe dbm dbo dbt dda ddb ddd dde ddm ddo ddt de- dea deb ded dee dem deo det dma dmb dmd dme dmm dmo dmt doa dob dod doe dom doo dot dta dtb dtd dte dtm dto dtt eaa eab ead eae eam eao eat eba ebb ebd ebe ebm ebo ebt ed- eda edb edd ede edm edo edt eea eeb eed eee eem eeo eet em- ema emb emd eme emm emo emt eo- eoa eob eod eoe eom eoo eot eta etb etd ete etm eto ett m-o maa mab mad mae mam mao mat mba mbb mbd mbe mbm mbo mbt mda mdb mdd mde mdm mdo mdt mea meb med mee mem meo met mma mmb mmd mme mmm mmo mmt moa mob mod moe mom moo mot mta mtb mtd mte mtm mto mtt oaa oab oad oae oam oao oat ob- oba obb obd obe obm obo obt oda odb odd ode odm odo odt oea oeb oed oee oem oeo oet om- oma omb omd ome omm omo omt oo- ooa oob ood oom ooo oot ot- ota otb otd ote otm oto ott taa tab tad tae tam tao tat tba tbb tbd tbe tbm tbo tbt tda tdb tdd tde tdm tdo tdt te- tea teb ted tee tem teo tet tma tmb tmd tme tmm tmo tmt to- toa tob tod toe tom too tot tta ttb ttd tte ttm tto ttt