-ic bbb bbc bbd bbi bbm bcb bcc bcd bci bcm bdb bdc bdd bdi bdm bi- bib bic bid bii bim bmb bmc bmd bmi bmm c-- cbb cbc cbd cbi cbm ccb ccc ccd cci ccm cdb cdc cdd cdi cdm ci- cib cic cid cii cim cmb cmc cmd cmi cmm dbb dbc dbd dbi dbm dcb dcc dcd dci dcm ddb ddc ddd ddi ddm di- dib dic did dii dim dmb dmc dmd dmi dmm i-d ibb ibc ibd ibi ibm icb icc icd ici icm idb idc idd idi idm iib iic iid iii iim im- imb imc imd imi imm mbb mbc mbd mbi mbm mc- mcb mcc mcd mci mcm mdb mdc mdd mdi mdm mi- mib mic mid mii mim mmb mmc mmd mmi mmm