b-u bbb bbd bbi bbo bbr bbs bbu bdb bdd bdi bdo bdr bds bdu bi- bib bid bii bio bir bis biu bob bod boi boo bor bos bou brb brd bri bro brr brs bru bsb bsd bsi bso bsr bss bsu bub bud bui buo bur bus buu dbb dbd dbi dbo dbr dbs dbu ddb ddd ddi ddo ddr dds ddu di- dib did dii dio dir dis diu dob dod doi doo dor dos dou drb drd dri dro drr drs dru dsb dsd dsi dso dsr dss dsu dub dud dui duo dur dus i-d ibb ibd ibi ibo ibr ibs ibu idb idd idi ido idr ids idu iib iid iii iio iir iis iiu io- iob iod ioi ioo ior ios iou ir- irb ird iri iro irr irs iru is- isb isd isi iso isr iss isu iu- iub iud iui iur ius o-i ob- obb obd obi obo obr obs obu odb odd odi odo odr ods odu oib oid oii oio oir ois oiu oo- oob ood ooi ooo oor oos or- orb ord ori oro orr ors oru os- osb osd osi oso osr oss osu ou- oud oui ouo our ous rbb rbd rbi rbo rbr rbs rbu rdb rdd rdi rdo rdr rds rdu rib rid rii rio rir ris rob rod roi roo ror ros rou rrb rrd rri rrr rrs rru rsb rsd rsi rso rsr rss rsu rub rud rui ruo rur rus ruu sbb sbd sbi sbo sbr sbs sbu sdb sdd sdi sdo sdr sds sdu sib sid sii sio sir sis siu sob sod soi soo sor sos sou sr- srb srd sri sro srr srs ss- ssb ssd ssi sso ssr sss ssu sub sud sui suo sur sus suu ubb ubi ubo ubr ubs ubu udb udd udi udo udr uds udu uib uid uii uio uir uis uiu uob uod uoo uor uos ur- urb urd uri uro urr urs uru usb usd usi uso usr uss usu uur uus uuu