bbb bbd bbe bbi bbk bbo bdb bdd bde bdi bdk bdo be- beb bed bee bei bek beo bi- bib bid bie bii bik bio bkb bke bkk bko bob bod boe boi bok boo dbb dbd dbe dbi dbk dbo ddb ddd dde ddi ddk ddo de- deb ded dee dei dek deo di- dib did die dii dik dio dkb dke dki dkk dko dob dod doe doi dok doo ebb ebd ebe ebi ebk ebo ed- edb edd ede edi edk edo eeb eed eee eek eeo eib eid eie eii eik eio ekb ekd eke eki eko eo- eob eod eoe eoi eok eoo i-d ibb ibd ibe ibi ibk ibo idb idd ide idi idk ido ie- ied iee iei iek iib iid iie iii iio ikb ike iki ikk iko io- iob iod ioe ioi ioo kbb kbd kbe kbi kbk kbo kdb kde kdk kdo ke- keb ked kee kei kek keo kib kid kie kii kik kio kkb kke kki kkk kob kod koe koi kok koo o-i ob- obb obd obe obi obk obo odb odd ode odi odo oeb oed oee oei oeo oib oid oie oii oik oio okb okd oke oki okk oko oo- oob ood ooi ook ooo