bbb bbd bbi bbo bbs bdb bdd bdi bdo bds bdv bi- bib bid bii bio bis biv bob bod boi boo bos bov bsb bsd bsi bso bss bsv bvb bvd bvi bvo bvs bvv dbb dbd dbi dbo dbs dbv ddb ddd ddi ddo dds di- dib did dii dio dis div dob dod doi doo dos dov dsb dsd dsi dso dss dsv dvb dvd dvi dvs i-d i-v ibb ibd ibi ibo ibs ibv idb idd idi ido ids idv iib iid iii iio iis io- iob iod ioi ioo ios iov is- isb isd isi iso iss isv ivb ivd ivi ivo ivs ivv o-i ob- obb obd obi obo obs obv odb odd odi odo ods odv oib oid oii oio ois oiv oo- oob ood ooi ooo oos oov os- osb osd osi oso oss osv ov- ovb ovd ovi ovo ovs ovv sbb sbd sbi sbo sbs sbv sdb sdd sdi sdo sds sdv sib sid sii sio sis siv sob sod soi soo sos sov ss- ssb ssd ssi sso sss ssv svb svd svi svo svs svv vbd vbi vbo vbs vbv vdb vdd vdi vdo vds vdv vi- vib vid vii vio vis viv vob vod voi voo vos vov vsb vsd vsi vso vss vsv vvb vvi vvo vvs vvv