bbb bbi bbm bbo bbs bby bi- bib bii bim bio bis biy bmb bmi bmm bmo bms bob boi bom boo bos boy bsb bsi bsm bso bss bsy by- byi bym byo bys ibb ibi ibm ibo ibs iby iib iii iim iio iis im- imb imi imm imo ims imy io- iob ioi iom ioo ios is- isb isi ism iso iss isy iym iyo iys iyy m-o mbb mbi mbm mbo mbs mi- mib mii mim mio mis miy mmb mmi mmm mmo mms mob moi mom moo mos moy msb msi msm mso mss msy my- myb mym myo mys o-i ob- obb obi obm obo obs oby oib oii oim oio ois om- omb omi omm omo oms omy oo- oob ooi oom ooo oos os- osb osi osm oso oss oyi oyo oys sbb sbi sbm sbo sbs sby sib sii sim sio sis smb smi smm smo sms smy sob soi som soo sos soy ss- ssb ssi ssm sso sss sy- syb syi sym sys ybi ybm ybs yby yii yim yio yis ymi ymm ymo yms yob yoi yom yoo yos yoy ysb ysi ysm yso yss ysy yyb yys yyy