bbb bbd bbe bbi bbo bdb bdd bde bdi bdo be- beb bed bee bei beo bi- bib bid bie bii bio bob bod boe boi boo dbb dbd dbe dbi dbo ddb ddd dde ddi ddo de- deb ded dee dei deo di- dib did die dii dio dob dod doe doi doo ebb ebd ebe ebi ebo ed- edb edd ede edi edo eeb eed eee eeo eib eid eie eii eio eo- eob eod eoe eoi eoo i-d ibb ibd ibe ibi ibo idb idd ide idi ido ie- ied iee iei iib iid iie iii iio io- iob iod ioe ioi ioo o-i ob- obb obd obe obi obo odb odd ode odi odo oeb oed oee oei oeo oib oid oie oii oio oo- oob ood ooi ooo