b-u bbb bbd bbg bbn bbr bbs bbu bdb bdd bdg bdr bds bdu bgb bgd bgg bgn bgr bgs bgu bnb bnd bng bnn bnr bns bnu brb brd brg brn brr brs bru bsb bsd bsg bsn bsr bss bsu bub bud bug bun bur bus buu dbb dbd dbg dbn dbr dbs dbu ddb ddd ddg ddn ddr dds ddu dgd dgg dgn dgr dgs dgu dnb dnd dng dnn dnr dns drb drd drg drn drr drs dru dsb dsd dsg dsn dsr dss dsu dub dud dug dun dur dus g-d gbd gbg gbn gbr gbs gbu gdb gdd gdn gdr gds gdu ggb ggd ggg ggn ggr ggs ggu gnb gnd gnn gnr gns gnu grb grd grg grn grr grs gru gsb gsd gsg gsn gsr gss gsu gu- gub gud gug gun gur gus guu nbb nbd nbg nbn nbr nbs nbu ndb ndd ndg ndn ndr nds ndu ngb ngd ngg ngn ngs ngu nnb nng nnn nns nnu nrb nrd nrg nrn nrr nrs nru nsb nsd nsg nsn nsr nss nsu nub nud nug nun nur nus nuu rbb rbd rbg rbn rbr rbs rbu rdb rdd rdg rdn rdr rds rdu rgb rgd rgg rgn rgr rgs rnb rnd rng rnn rnr rns rnu rrb rrd rrg rrn rrr rrs rru rsb rsd rsg rsn rsr rss rsu rub rud rug run rur rus ruu sbb sbd sbg sbn sbr sbs sbu sdb sdd sdg sdn sdr sds sdu sgb sgd sgg sgn sgr sgs sgu snb snd sng snn snr sns snu sr- srb srd srg srn srr srs ss- ssb ssd ssg ssn ssr sss ssu sub sud sug sun sur sus suu ubb ubg ubn ubr ubs ubu udb udd udg udn udr uds udu ugb ugg ugn ugr ugs ugu un- unb und ung unn unr uns unu ur- urb urd urg urn urr urs uru usb usd usg usn usr uss usu uug uun uur uus uuu