-ic bbb bbc bbi bbm bbo bbr bby bcb bcc bci bcm bco bcr bcy bi- bib bic bii bim bio bir biy bmb bmc bmi bmm bmo bmr bob boc boi bom boo bor boy brb bri brm bro brr bry by- byc byi bym byo byr c-- cbb cbc cbi cbm cbo cbr cby ccb ccc cci ccm cco ccr ci- cib cic cii cim cio cir cmb cmc cmi cmm cmo cmr cmy co- cob coc coi com coo cor coy crb crc cri crm cro crr cry cyb cyc cym cyo cyr ibb ibc ibi ibm ibo ibr iby icb icc ici icm ico icr icy iib iic iii iim iio iir im- imb imc imi imm imo imy io- iob ioc ioi iom ioo ior ir- irb irc iri irm iro irr iry iyc iym iyo iyr iyy m-o m-r mbb mbc mbi mbm mbo mbr mc- mcb mcc mci mcm mco mcr mi- mib mic mii mim mio mir miy mmb mmc mmi mmm mmo mmr mob moc moi mom moo mor moy mrb mrc mri mrm mro mrr mry my- myb myc mym myo myr o-i ob- obb obc obi obm obo obr oby oc- ocb occ oci ocm oco ocr oib oic oii oim oio oir om- omb omc omi omm omo omr omy oo- oob ooc ooi oom ooo oor or- orb orc ori orm oro orr ory oyi oyo rbb rbc rbi rbm rbo rbr rcb rcc rci rcm rco rcr rib ric rii rim rio rir riy rmb rmc rmi rmm rmo rmr rob roc roi rom roo ror roy rrb rrc rri rrm rrr ry- ryc rym ryo ryr ryy ybc ybi ybm ybr yby ycc yci yco ycy yii yim yio yir ymc ymi ymm ymo yob yoc yoi yom yoo yor yoy yrc yro yyb yyc yyy