-ic bbb bbc bbd bbi bbm bby bcb bcc bcd bci bcm bcy bdb bdc bdd bdi bdm bdy bi- bib bic bid bii bim biy bmb bmc bmd bmi bmm by- byc byd byi bym c-- cbb cbc cbd cbi cbm cby ccb ccc ccd cci ccm cdb cdc cdd cdi cdm cdy ci- cib cic cid cii cim cmb cmc cmd cmi cmm cmy cyb cyc cyd cym dbb dbc dbd dbi dbm dby dcb dcc dcd dci dcm ddb ddc ddd ddi ddm ddy di- dib dic did dii dim diy dmb dmc dmd dmi dmm dy- dyb dyc dyd dym dyy i-d ibb ibc ibd ibi ibm iby icb icc icd ici icm icy idb idc idd idi idm idy iib iic iid iii iim im- imb imc imd imi imm imy iyc iym iyy mbb mbc mbd mbi mbm mc- mcb mcc mcd mci mcm mdb mdc mdd mdi mdm mdy mi- mib mic mid mii mim miy mmb mmc mmd mmi mmm my- myb myc myd mym ybc ybi ybm yby ycc ycd yci ycy ydy yid yii yim ymc ymi ymm yyb yyc yyy