b-u bbb bbi bbm bbn bbo bbr bbu bi- bib bii bim bin bio bir biu bmb bmi bmm bmn bmo bmr bmu bnb bni bnn bno bnr bnu bob boi bom bon boo bor bou brb bri brm brn bro brr bru bub bui bum bun buo bur buu ibb ibi ibm ibn ibo ibr ibu iib iii iim iin iio iir iiu im- imb imi imm imn imo imu in- inb ini inm inn ino inr inu io- iob ioi iom ion ioo ior iou ir- irb iri irm irn iro irr iru iu- iub iui ium iur m-o m-r mbb mbi mbm mbo mbr mbu mi- mib mii mim min mio mir miu mmb mmi mmm mmn mmo mmr mmu mnb mni mnm mnn mno mnr mnu mob moi mom mon moo mor mou mrb mri mrm mrn mro mrr mru mub mui mum mun mur muu n-i nbb nbi nbm nbn nbo nbr nbu nib nii nim nin nio nir niu nmb nmi nmm nmn nmo nmr nmu nnb nni nnm nnn nno nnu no- nob noi nom non noo nor nou nrb nri nrm nrn nro nrr nru nub nui num nun nuo nur nuu o-i ob- obb obi obm obn obo obr obu oib oii oim oin oio oir oiu om- omb omi omm omn omo omr omu on- onb oni onn ono onr onu oo- oob ooi oom oon ooo oor or- orb ori orm orn oro orr oru ou- oui oum oun ouo our rbb rbi rbm rbn rbo rbr rbu rib rii rim rin rio rir rmb rmi rmm rmn rmo rmr rnb rni rnm rnn rno rnr rnu rob roi rom ron roo ror rou rrb rri rrm rrn rrr rru rub rui rum run ruo rur ruu ubb ubi ubn ubo ubr ubu uib uii uim uin uio uir uiu um- umb umi umm umn umo umr umu un- unb uni unm unn uno unr unu uob uom uon uoo uor ur- urb uri urm urn uro urr uru uum uun uur uuu