-ic bbb bbc bbd bbi bbo bbr bcb bcc bcd bci bco bcr bcz bdb bdc bdd bdi bdo bdr bdz bi- bib bic bid bii bio bir biz bob boc bod boi boo bor boz brb brd bri bro brr brz bzd bzo bzr bzz c-- cbb cbc cbd cbi cbo cbr cbz ccb ccc ccd cci cco ccr ccz cdb cdc cdd cdi cdo cdr cdz ci- cib cic cid cii cio cir co- cob coc cod coi coo cor coz crb crc crd cri cro crr crz cz- czc czd czo dbb dbc dbd dbi dbo dbr dbz dcb dcc dcd dci dco dcr ddb ddc ddd ddi ddo ddr ddz di- dib dic did dii dio dir diz dob doc dod doi doo dor doz drb drc drd dri dro drr drz dzb dzd dzi dzo dzr i-d ibb ibc ibd ibi ibo ibr ibz icb icc icd ici ico icr icz idb idc idd idi ido idr iib iic iid iii iio iir io- iob ioc iod ioi ioo ior ir- irb irc ird iri iro irr izi izo izz o-i ob- obb obc obd obi obo obr oc- ocb occ ocd oci oco ocr ocz odb odc odd odi odo odr oib oic oid oii oio oir oiz oo- oob ooc ood ooi ooo oor or- orb orc ord ori oro orr orz ozo ozz rbb rbc rbd rbi rbo rbr rcb rcc rcd rci rco rcr rdb rdc rdd rdi rdo rdr rib ric rid rii rio rir riz rob roc rod roi roo ror roz rrb rrc rrd rri rrr rzb rzo zbb zbc zbr zco zib zid zio zir ziz zo- zob zoc zod zoi zoo zor zro zzr zzz