b-u bbb bbd bbi bbn bbr bbs bbu bdb bdd bdi bdr bds bdu bi- bib bid bii bin bir bis biu bnb bnd bni bnn bnr bns bnu brb brd bri brn brr brs bru bsb bsd bsi bsn bsr bss bsu bub bud bui bun bur bus buu dbb dbd dbi dbn dbr dbs dbu ddb ddd ddi ddn ddr dds ddu di- dib did dii din dir dis diu dnb dnd dni dnn dnr dns drb drd dri drn drr drs dru dsb dsd dsi dsn dsr dss dsu dub dud dui dun dur dus i-d ibb ibd ibi ibn ibr ibs ibu idb idd idi idn idr ids idu iib iid iii iin iir iis iiu in- inb ind ini inn inr ins inu ir- irb ird iri irn irr irs iru is- isb isd isi isn isr iss isu iu- iub iud iui iur ius n-i nbb nbd nbi nbn nbr nbs nbu ndb ndd ndi ndn ndr nds ndu nib nid nii nin nir nis niu nnb nni nnn nns nnu nrb nrd nri nrn nrr nrs nru nsb nsd nsi nsn nsr nss nsu nub nud nui nun nur nus nuu rbb rbd rbi rbn rbr rbs rbu rdb rdd rdi rdn rdr rds rdu rib rid rii rin rir ris rnb rnd rni rnn rnr rns rnu rrb rrd rri rrn rrr rrs rru rsb rsd rsi rsn rsr rss rsu rub rud rui run rur rus ruu sbb sbd sbi sbn sbr sbs sbu sdb sdd sdi sdn sdr sds sdu sib sid sii sin sir sis siu snb snd sni snn snr sns snu sr- srb srd sri srn srr srs ss- ssb ssd ssi ssn ssr sss ssu sub sud sui sun sur sus suu ubb ubi ubn ubr ubs ubu udb udd udi udn udr uds udu uib uid uii uin uir uis uiu un- unb und uni unn unr uns unu ur- urb urd uri urn urr urs uru usb usd usi usn usr uss usu uun uur uus uuu