a-a a-b a-t aaa aab aad aam aao aar aat ab- aba abb abd abm abo abr abt ad- ada adb add adm ado adr adt ama amb amd amm amo amr amt aoa aob aod aom aoo aor aot ar- ara arb ard arm aro arr art at- ata atb atd atm ato atr att baa bab bad bam bao bar bat bba bbb bbd bbm bbo bbr bbt bda bdb bdd bdm bdo bdr bdt bma bmb bmd bmm bmo bmr bmt boa bob bod bom boo bor bot bra brb brd brm bro brr brt bta btb btd btm bto btr btt daa dab dad dam dao dar dat dba dbb dbd dbm dbo dbr dbt dda ddb ddd ddm ddo ddr ddt dma dmb dmd dmm dmo dmr dmt doa dob dod dom doo dor dot dra drb drd drm dro drr drt dta dtb dtd dtm dto dtr dtt m-o m-r maa mab mad mam mao mar mat mba mbb mbd mbm mbo mbr mbt mda mdb mdd mdm mdo mdr mdt mma mmb mmd mmm mmo mmr mmt moa mob mod mom moo mor mot mra mrb mrd mrm mro mrr mrt mta mtb mtd mtm mto mtr mtt oaa oab oad oam oao oar oat ob- oba obb obd obm obo obr obt oda odb odd odm odo odr odt om- oma omb omd omm omo omr omt oo- ooa oob ood oom ooo oor oot or- ora orb ord orm oro orr ort ot- ota otb otd otm oto otr ott ra- raa rab rad ram rao rar rat rba rbb rbd rbm rbo rbr rbt rda rdb rdd rdm rdo rdr rdt rma rmb rmd rmm rmo rmr rmt roa rob rod rom roo ror rot rra rrb rrd rrm rrr rrt rta rtb rtd rtm rto rtr rtt taa tab tad tam tao tar tat tba tbb tbd tbm tbo tbr tbt tda tdb tdd tdm tdo tdr tdt tma tmb tmd tmm tmo tmr tmt to- toa tob tod tom too tor tot tra trb trd trm tro trr trt tta ttb ttd ttm tto ttr ttt