-ic bbb bbc bbi bbk bbm bbo bcb bcc bci bck bcm bco bi- bib bic bii bik bim bio bkb bkc bkk bkm bko bmb bmc bmi bmk bmm bmo bob boc boi bok bom boo c-- cbb cbc cbi cbk cbm cbo ccb ccc cci cck ccm cco ci- cib cic cii cik cim cio ckb ckc cki ckm cko cmb cmc cmi cmk cmm cmo co- cob coc coi cok com coo ibb ibc ibi ibk ibm ibo icb icc ici ick icm ico iib iic iii iim iio ikb ikc iki ikk iko im- imb imc imi imm imo io- iob ioc ioi iom ioo kbb kbc kbi kbk kbm kbo kcb kcc kci kck kcm kib kic kii kik kim kio kkb kkc kki kkk kkm kmb kmc kmi kmk kmm kmo kob koc koi kok kom koo m-o mbb mbc mbi mbk mbm mbo mc- mcb mcc mci mck mcm mco mi- mib mic mii mik mim mio mkb mkc mkk mkm mko mmb mmc mmi mmk mmm mmo mob moc moi mok mom moo o-i ob- obb obc obi obk obm obo oc- ocb occ oci ock ocm oco oib oic oii oik oim oio okb okc oki okk oko om- omb omc omi omm omo oo- oob ooc ooi ook oom ooo