b-u bbb bbd bbg bbk bbm bbo bbr bbu bdb bdd bdg bdk bdm bdo bdr bdu bgb bgd bgg bgk bgm bgo bgr bgu bkb bkg bkk bkm bko bkr bmb bmd bmg bmk bmm bmo bmr bmu bob bod bog bok bom boo bor bou brb brd brg brk brm bro brr bru bub bud bug buk bum buo bur buu dbb dbd dbg dbk dbm dbo dbr dbu ddb ddd ddg ddk ddm ddo ddr ddu dgd dgg dgk dgm dgr dgu dkb dkg dkk dkm dko dkr dku dmb dmd dmg dmk dmm dmo dmr dmu dob dod dog dok dom doo dor dou drb drd drg drk drm dro drr dru dub dud dug duk dum duo dur g-d gbd gbg gbk gbm gbo gbr gbu gdb gdd gdk gdm gdo gdr gdu ggb ggd ggg ggm ggo ggr ggu gkb gkd gkm gko gmb gmd gmg gmm gmo gmr gob god gog gok gom goo gor gou grb grd grg grk grm gro grr gru gu- gub gud gug guk gum guo gur guu kbb kbd kbk kbm kbo kbr kbu kdb kdg kdk kdm kdo kdr kdu kgb kgd kgm kgo kgu kkb kkk kkm kkr kku kmb kmd kmg kmk kmm kmo kmu kob kod kog kok kom koo kor kou krd krg krk kro krr kru kub kud kug kuk kum kur kuu m-o m-r mbb mbd mbg mbk mbm mbo mbr mbu mdb mdd mdg mdk mdm mdo mdr mdu mgb mgd mgk mgm mgo mgr mgu mkb mkd mkg mkk mkm mko mkr mku mmb mmd mmg mmk mmm mmo mmr mmu mob mod mog mok mom moo mor mou mrb mrd mrg mrk mrm mro mrr mru mub mud mug muk mum mur muu ob- obb obd obg obk obm obo obr obu odb odd odg odm odo odr odu ogd ogg ogo okb okd okg okk oko okr oku om- omb omd omg omm omo omr omu oo- oob ood oog ook oom ooo oor or- orb ord org ork orm oro orr oru ou- oud ouk oum ouo our rbb rbd rbg rbk rbm rbo rbr rbu rdb rdd rdg rdm rdo rdr rdu rgb rgd rgg rgk rgo rgr rkb rkg rkk rkm rko rku rmb rmd rmg rmm rmo rmr rob rod rog rok rom roo ror rou rrb rrd rrg rrk rrm rrr rru rub rud rug ruk rum ruo rur ruu ubb ubg ubk ubo ubr ubu udb udd udg udk udm udo udr udu ugb ugg ugk ugm ugo ugr ugu ukb ukk ukr uku um- umb umd umg umm umo umr umu uob uod uog uok uom uoo uor ur- urb urd urg urk urm uro urr uru uug uum uur uuu