b-u bbb bbd bbi bbo bbs bbu bdb bdd bdi bdo bds bdu bi- bib bid bii bio bis biu bob bod boi boo bos bou bsb bsd bsi bso bss bsu bub bud bui buo bus buu dbb dbd dbi dbo dbs dbu ddb ddd ddi ddo dds ddu di- dib did dii dio dis diu dob dod doi doo dos dou dsb dsd dsi dso dss dsu dub dud dui duo dus i-d ibb ibd ibi ibo ibs ibu idb idd idi ido ids idu iib iid iii iio iis iiu io- iob iod ioi ioo ios iou is- isb isd isi iso iss isu iu- iub iud iui ius o-i ob- obb obd obi obo obs obu odb odd odi odo ods odu oib oid oii oio ois oiu oo- oob ood ooi ooo oos os- osb osd osi oso oss osu ou- oud oui ouo ous sbb sbd sbi sbo sbs sbu sdb sdd sdi sdo sds sdu sib sid sii sio sis siu sob sod soi soo sos sou ss- ssb ssd ssi sso sss ssu sub sud sui suo sus suu ubb ubi ubo ubs ubu udb udd udi udo uds udu uib uid uii uio uis uiu uob uod uoo uos usb usd usi uso uss usu uus uuu