-ic bbb bbc bbi bbm bbo bbs bby bcb bcc bci bcm bco bcs bcy bi- bib bic bii bim bio bis biy bmb bmc bmi bmm bmo bms bob boc boi bom boo bos boy bsb bsc bsi bsm bso bss bsy by- byc byi bym byo bys c-- cbb cbc cbi cbm cbo cbs cby ccb ccc cci ccm cco ccs ci- cib cic cii cim cio cis cmb cmc cmi cmm cmo cms cmy co- cob coc coi com coo cos coy csb csc csi csm cso css csy cyb cyc cym cyo cys ibb ibc ibi ibm ibo ibs iby icb icc ici icm ico ics icy iib iic iii iim iio iis im- imb imc imi imm imo ims imy io- iob ioc ioi iom ioo ios is- isb isc isi ism iso iss isy iyc iym iyo iys iyy m-o mbb mbc mbi mbm mbo mbs mc- mcb mcc mci mcm mco mcs mi- mib mic mii mim mio mis miy mmb mmc mmi mmm mmo mms mob moc moi mom moo mos moy msb msc msi msm mso mss msy my- myb myc mym myo mys o-i ob- obb obc obi obm obo obs oby oc- ocb occ oci ocm oco ocs oib oic oii oim oio ois om- omb omc omi omm omo oms omy oo- oob ooc ooi oom ooo oos os- osb osc osi osm oso oss oyi oyo oys sbb sbc sbi sbm sbo sbs sby scb scc sci scm sco scs sib sic sii sim sio sis smb smc smi smm smo sms smy sob soc soi som soo sos soy ss- ssb ssc ssi ssm sso sss sy- syb syc syi sym sys ybc ybi ybm ybs yby ycc yci yco ycs ycy yii yim yio yis ymc ymi ymm ymo yms yob yoc yoi yom yoo yos yoy ysb ysc ysi ysm yso yss ysy yyb yyc yys yyy