b-u bbb bbi bbm bbo bbs bbu bby bi- bib bii bim bio bis biu biy bmb bmi bmm bmo bms bmu bob boi bom boo bos bou boy bsb bsi bsm bso bss bsu bsy bub bui bum buo bus buu buy by- byi bym byo bys byu ibb ibi ibm ibo ibs ibu iby iib iii iim iio iis iiu im- imb imi imm imo ims imu imy io- iob ioi iom ioo ios iou is- isb isi ism iso iss isu isy iu- iub iui ium ius iym iyo iys iyy m-o mbb mbi mbm mbo mbs mbu mi- mib mii mim mio mis miu miy mmb mmi mmm mmo mms mmu mob moi mom moo mos mou moy msb msi msm mso mss msu msy mub mui mum mus muu muy my- myb mym myo mys myu o-i ob- obb obi obm obo obs obu oby oib oii oim oio ois oiu om- omb omi omm omo oms omu omy oo- oob ooi oom ooo oos os- osb osi osm oso oss osu ou- oui oum ouo ous oyi oyo oys sbb sbi sbm sbo sbs sbu sby sib sii sim sio sis siu smb smi smm smo sms smu smy sob soi som soo sos sou soy ss- ssb ssi ssm sso sss ssu sub sui sum suo sus suu suy sy- syb syi sym sys syu ubb ubi ubo ubs ubu uby uib uii uim uio uis uiu um- umb umi umm umo ums umu uob uom uoo uos usb usi usm uso uss usu uum uus uuu uyi uyo uys uyu ybi ybm ybs yby yii yim yio yis ymi ymm ymo yms yob yoi yom yoo yos you yoy ysb ysi ysm yso yss ysu ysy yui yum yuo yus yuu yuy yyb yys yyu yyy