a-a a-b a-t aaa aab aad aam aao aar aas aat ab- aba abb abd abm abo abr abs abt ad- ada adb add adm ado adr ads adt ama amb amd amm amo amr ams amt aoa aob aod aom aoo aor aos aot ar- ara arb ard arm aro arr ars art as- asa asb asd asm aso asr ass ast at- ata atb atd atm ato atr ats att baa bab bad bam bao bar bas bat bba bbb bbd bbm bbo bbr bbs bbt bda bdb bdd bdm bdo bdr bds bdt bma bmb bmd bmm bmo bmr bms bmt boa bob bod bom boo bor bos bot bra brb brd brm bro brr brs brt bsa bsb bsd bsm bso bsr bss bst bta btb btd btm bto btr bts btt daa dab dad dam dao dar das dat dba dbb dbd dbm dbo dbr dbs dbt dda ddb ddd ddm ddo ddr dds ddt dma dmb dmd dmm dmo dmr dms dmt doa dob dod dom doo dor dos dot dra drb drd drm dro drr drs drt dsa dsb dsd dsm dso dsr dss dst dta dtb dtd dtm dto dtr dts dtt m-o m-r maa mab mad mam mao mar mas mat mba mbb mbd mbm mbo mbr mbs mbt mda mdb mdd mdm mdo mdr mds mdt mma mmb mmd mmm mmo mmr mms mmt moa mob mod mom moo mor mos mot mra mrb mrd mrm mro mrr mrs mrt msa msb msd msm mso msr mss mst mta mtb mtd mtm mto mtr mts mtt oaa oab oad oam oao oar oas oat ob- oba obb obd obm obo obr obs obt oda odb odd odm odo odr ods odt om- oma omb omd omm omo omr oms omt oo- ooa oob ood oom ooo oor oos oot or- ora orb ord orm oro orr ors ort os- osa osb osd osm oso osr oss ost ot- ota otb otd otm oto otr ots ott ra- raa rab rad ram rao rar ras rat rba rbb rbd rbm rbo rbr rbs rbt rda rdb rdd rdm rdo rdr rds rdt rma rmb rmd rmm rmo rmr rms rmt roa rob rod rom roo ror ros rot rra rrb rrd rrm rrr rrs rrt rsa rsb rsd rsm rso rsr rss rst rta rtb rtd rtm rto rtr rts rtt saa sab sad sam sao sar sas sat sba sbb sbd sbm sbo sbr sbs sbt sda sdb sdd sdm sdo sdr sds sdt sma smb smd smm smo smr sms smt soa sob sod som soo sor sos sot sr- sra srb srd srm sro srr srs srt ss- ssa ssb ssd ssm sso ssr sss sst sta stb std stm sto str sts stt taa tab tad tam tao tar tas tat tba tbb tbd tbm tbo tbr tbs tbt tda tdb tdd tdm tdo tdr tds tdt tma tmb tmd tmm tmo tmr tms tmt to- toa tob tod tom too tor tos tot tra trb trd trm tro trr trs trt tsa tsb tsd tsm tso tsr tss tst tta ttb ttd ttm tto ttr tts ttt