a-a a-b a-t aaa aab aad aam aao aat ab- aba abb abd abm abo abt ad- ada adb add adm ado adt ama amb amd amm amo amt aoa aob aod aom aoo aot at- ata atb atd atm ato att baa bab bad bam bao bat bba bbb bbd bbm bbo bbt bda bdb bdd bdm bdo bdt bma bmb bmd bmm bmo bmt boa bob bod bom boo bot bta btb btd btm bto btt daa dab dad dam dao dat dba dbb dbd dbm dbo dbt dda ddb ddd ddm ddo ddt dma dmb dmd dmm dmo dmt doa dob dod dom doo dot dta dtb dtd dtm dto dtt m-o maa mab mad mam mao mat mba mbb mbd mbm mbo mbt mda mdb mdd mdm mdo mdt mma mmb mmd mmm mmo mmt moa mob mod mom moo mot mta mtb mtd mtm mto mtt oaa oab oad oam oao oat ob- oba obb obd obm obo obt oda odb odd odm odo odt om- oma omb omd omm omo omt oo- ooa oob ood oom ooo oot ot- ota otb otd otm oto ott taa tab tad tam tao tat tba tbb tbd tbm tbo tbt tda tdb tdd tdm tdo tdt tma tmb tmd tmm tmo tmt to- toa tob tod tom too tot tta ttb ttd ttm tto ttt