b-u bbb bbi bbm bbo bbr bbu bby bi- bib bii bim bio bir biu biy bmb bmi bmm bmo bmr bmu bob boi bom boo bor bou boy brb bri brm bro brr bru bry bub bui bum buo bur buu buy by- byi bym byo byr byu ibb ibi ibm ibo ibr ibu iby iib iii iim iio iir iiu im- imb imi imm imo imu imy io- iob ioi iom ioo ior iou ir- irb iri irm iro irr iru iry iu- iub iui ium iur iym iyo iyr iyy m-o m-r mbb mbi mbm mbo mbr mbu mi- mib mii mim mio mir miu miy mmb mmi mmm mmo mmr mmu mob moi mom moo mor mou moy mrb mri mrm mro mrr mru mry mub mui mum mur muu muy my- myb mym myo myr myu o-i ob- obb obi obm obo obr obu oby oib oii oim oio oir oiu om- omb omi omm omo omr omu omy oo- oob ooi oom ooo oor or- orb ori orm oro orr oru ory ou- oui oum ouo our oyi oyo rbb rbi rbm rbo rbr rbu rib rii rim rio rir riy rmb rmi rmm rmo rmr rob roi rom roo ror rou roy rrb rri rrm rrr rru rub rui rum ruo rur ruu ruy ry- rym ryo ryr ryu ryy ubb ubi ubo ubr ubu uby uib uii uim uio uir uiu um- umb umi umm umo umr umu uob uom uoo uor ur- urb uri urm uro urr uru ury uum uur uuu uyi uyo uyu ybi ybm ybr yby yii yim yio yir ymi ymm ymo yob yoi yom yoo yor you yoy yro yru yui yum yuo yur yuu yuy yyb yyu yyy