bbb bbd bbi bbo bdb bdd bdi bdo bdz bi- bib bid bii bio biz bob bod boi boo boz bzd bzo bzz dbb dbd dbi dbo dbz ddb ddd ddi ddo ddz di- dib did dii dio diz dob dod doi doo doz dzb dzd dzi dzo i-d ibb ibd ibi ibo ibz idb idd idi ido iib iid iii iio io- iob iod ioi ioo izi izo izz o-i ob- obb obd obi obo odb odd odi odo oib oid oii oio oiz oo- oob ood ooi ooo ozo ozz zbb zib zid zio ziz zo- zob zod zoi zoo zzz