a-a a-b aaa aab aad aag aao aar aas ab- aba abb abd abg abo abr abs ad- ada adb add adg ado adr ads ag- aga agb agd agg ago agr ags aoa aob aod aog aoo aor aos ar- ara arb ard arg aro arr ars as- asa asb asd asg aso asr ass baa bab bad bag bao bar bas bba bbb bbd bbg bbo bbr bbs bda bdb bdd bdg bdo bdr bds bga bgb bgd bgg bgo bgr bgs boa bob bod bog boo bor bos bra brb brd brg bro brr brs bsa bsb bsd bsg bso bsr bss daa dab dad dag dao dar das dba dbb dbd dbg dbo dbr dbs dda ddb ddd ddg ddo ddr dds dga dgd dgg dgr dgs doa dob dod dog doo dor dos dra drb drd drg dro drr drs dsa dsb dsd dsg dso dsr dss g-d gaa gab gad gag gao gar gas gba gbd gbg gbo gbr gbs gda gdb gdd gdo gdr gds gga ggb ggd ggg ggo ggr ggs goa gob god gog goo gor gos gra grb grd grg gro grr grs gsa gsb gsd gsg gso gsr gss oaa oab oad oag oao oar oas ob- oba obb obd obg obo obr obs oda odb odd odg odo odr ods oga ogd ogg ogo ogs oo- ooa oob ood oog ooo oor oos or- ora orb ord org oro orr ors os- osa osb osd osg oso osr oss ra- raa rab rad rag rao rar ras rba rbb rbd rbg rbo rbr rbs rda rdb rdd rdg rdo rdr rds rga rgb rgd rgg rgo rgr rgs roa rob rod rog roo ror ros rra rrb rrd rrg rrr rrs rsa rsb rsd rsg rso rsr rss saa sab sad sag sao sar sas sba sbb sbd sbg sbo sbr sbs sda sdb sdd sdg sdo sdr sds sga sgb sgd sgg sgo sgr sgs soa sob sod sog soo sor sos sr- sra srb srd srg sro srr srs ss- ssa ssb ssd ssg sso ssr sss