-ic bbb bbc bbe bbi bbk bbm bbo bcb bcc bce bci bck bcm bco be- beb bec bee bei bek bem beo bi- bib bic bie bii bik bim bio bkb bkc bke bkk bkm bko bmb bmc bme bmi bmk bmm bmo bob boc boe boi bok bom boo c-- cbb cbc cbe cbi cbk cbm cbo ccb ccc cce cci cck ccm cco ce- ceb cec cee cei cek cem ceo ci- cib cic cie cii cik cim cio ckb ckc cki ckm cko cmb cmc cme cmi cmk cmm cmo co- cob coc coe coi cok com coo ebb ebc ebe ebi ebk ebm ebo ec- ecb ecc ece eci eck ecm eco eeb eec eee eek eem eeo eib eic eie eii eik eim eio ekb ekc eke eki eko em- emb emc eme emi emk emm emo eo- eob eoc eoe eoi eok eom eoo ibb ibc ibe ibi ibk ibm ibo icb icc ice ici ick icm ico ie- iec iee iei iek iem iib iic iie iii iim iio ikb ikc ike iki ikk iko im- imb imc ime imi imm imo io- iob ioc ioe ioi iom ioo kbb kbc kbe kbi kbk kbm kbo kcb kcc kce kci kck kcm ke- keb kec kee kei kek kem keo kib kic kie kii kik kim kio kkb kkc kke kki kkk kkm kmb kmc kme kmi kmk kmm kmo kob koc koe koi kok kom koo m-o mbb mbc mbe mbi mbk mbm mbo mc- mcb mcc mce mci mck mcm mco meb mec mee mei mek mem meo mi- mib mic mie mii mik mim mio mkb mkc mke mkk mkm mko mmb mmc mme mmi mmk mmm mmo mob moc moe moi mok mom moo o-i ob- obb obc obe obi obk obm obo oc- ocb occ oci ock ocm oco oeb oec oee oei oem oeo oib oic oie oii oik oim oio okb okc oke oki okk oko om- omb omc ome omi omm omo oo- oob ooc ooi ook oom ooo