bbb bbd bbe bbi bbo bbs bdb bdd bde bdi bdo bds be- beb bed bee bei beo bes bi- bib bid bie bii bio bis bob bod boe boi boo bos bsb bsd bse bsi bso bss dbb dbd dbe dbi dbo dbs ddb ddd dde ddi ddo dds de- deb ded dee dei deo des di- dib did die dii dio dis dob dod doe doi doo dos dsb dsd dse dsi dso dss ebb ebd ebe ebi ebo ebs ed- edb edd ede edi edo eds eeb eed eee eeo ees eib eid eie eii eio eis eo- eob eod eoe eoi eoo eos es- esb esd ese esi eso ess i-d ibb ibd ibe ibi ibo ibs idb idd ide idi ido ids ie- ied iee iei ies iib iid iie iii iio iis io- iob iod ioe ioi ioo ios is- isb isd ise isi iso iss o-i ob- obb obd obe obi obo obs odb odd ode odi odo ods oeb oed oee oei oeo oes oib oid oie oii oio ois oo- oob ood ooi ooo oos os- osb osd ose osi oso oss sbb sbd sbe sbi sbo sbs sdb sdd sde sdi sdo sds se- seb sed see sei seo ses sib sid sie sii sio sis sob sod soe soi soo sos ss- ssb ssd sse ssi sso sss