a-a a-b a-t aaa aab aad aam aan aao aar aat ab- aba abb abd abm abn abo abr abt ad- ada adb add adm adn ado adr adt ama amb amd amm amn amo amr amt an- ana anb and anm ann ano anr ant aoa aob aod aom aon aoo aor aot ar- ara arb ard arm arn aro arr art at- ata atb atd atm atn ato atr att baa bab bad bam ban bao bar bat bba bbb bbd bbm bbn bbo bbr bbt bda bdb bdd bdm bdo bdr bdt bma bmb bmd bmm bmn bmo bmr bmt bna bnb bnd bnn bno bnr bnt boa bob bod bom bon boo bor bot bra brb brd brm brn bro brr brt bta btb btd btm btn bto btr btt daa dab dad dam dan dao dar dat dba dbb dbd dbm dbn dbo dbr dbt dda ddb ddd ddm ddn ddo ddr ddt dma dmb dmd dmm dmn dmo dmr dmt dna dnb dnd dnm dnn dno dnr dnt doa dob dod dom don doo dor dot dra drb drd drm drn dro drr drt dta dtb dtd dtm dtn dto dtr dtt m-o m-r maa mab mad mam man mao mar mat mba mbb mbd mbm mbo mbr mbt mda mdb mdd mdm mdn mdo mdr mdt mma mmb mmd mmm mmn mmo mmr mmt mna mnb mnm mnn mno mnr mnt moa mob mod mom mon moo mor mot mra mrb mrd mrm mrn mro mrr mrt mta mtb mtd mtm mtn mto mtr mtt naa nab nad nam nan nao nar nat nba nbb nbd nbm nbn nbo nbr nbt nda ndb ndd ndm ndn ndo ndr ndt nma nmb nmd nmm nmn nmo nmr nmt nna nnb nnm nnn nno nnt no- noa nob nod nom non noo nor not nra nrb nrd nrm nrn nro nrr nrt nta ntb ntd ntm ntn nto ntr ntt oaa oab oad oam oan oao oar oat ob- oba obb obd obm obn obo obr obt oda odb odd odm odn odo odr odt om- oma omb omd omm omn omo omr omt on- ona onb ond onn ono onr ont oo- ooa oob ood oom oon ooo oor oot or- ora orb ord orm orn oro orr ort ot- ota otb otd otm otn oto otr ott ra- raa rab rad ram ran rao rar rat rba rbb rbd rbm rbn rbo rbr rbt rda rdb rdd rdm rdn rdo rdr rdt rma rmb rmd rmm rmn rmo rmr rmt rna rnb rnd rnm rnn rno rnr rnt roa rob rod rom ron roo ror rot rra rrb rrd rrm rrn rrr rrt rta rtb rtd rtm rtn rto rtr rtt taa tab tad tam tan tao tar tat tba tbb tbd tbm tbn tbo tbr tbt tda tdb tdd tdm tdn tdo tdr tdt tma tmb tmd tmm tmn tmo tmr tmt tna tnb tnd tnm tnn tno tnr tnt to- toa tob tod tom ton too tor tot tra trb trd trm trn tro trr trt tta ttb ttd ttm ttn tto ttr ttt