b-u bbb bbg bbi bbk bbn bbo bbr bbu bgb bgg bgi bgk bgn bgo bgr bgu bi- bib big bii bik bin bio bir biu bkb bkg bkk bkn bko bkr bnb bng bni bnk bnn bno bnr bnu bob bog boi bok bon boo bor bou brb brg bri brk brn bro brr bru bub bug bui buk bun buo bur buu gbg gbi gbk gbn gbo gbr gbu ggb ggg ggi ggn ggo ggr ggu gib gig gii gik gin gio gir giu gkb gkn gko gnb gni gnn gno gnr gnu gob gog goi gok gon goo gor gou grb grg gri grk grn gro grr gru gu- gub gug gui guk gun guo gur guu ibb ibg ibi ibk ibn ibo ibr ibu igb igg igi igk ign igo igr igu iib iii iin iio iir iiu ikb iki ikk iko ikr iku in- inb ing ini ink inn ino inr inu io- iob iog ioi ion ioo ior iou ir- irb irg iri irk irn iro irr iru iu- iub iug iui iur kbb kbi kbk kbn kbo kbr kbu kgb kgi kgo kgu kib kig kii kik kin kio kir kiu kkb kki kkk kkn kkr kku kn- kng kni knk knn kno knr knu kob kog koi kok kon koo kor kou krg kri krk krn kro krr kru kub kug kui kuk kun kur kuu n-i nbb nbg nbi nbk nbn nbo nbr nbu ngb ngg ngi ngk ngn ngo ngu nib nig nii nik nin nio nir niu nki nkk nkn nko nkr nku nnb nng nni nnk nnn nno nnu no- nob nog noi nok non noo nor nou nrb nrg nri nrk nrn nro nrr nru nub nug nui nuk nun nuo nur nuu o-i ob- obb obg obi obk obn obo obr obu ogg ogi ogn ogo oib oii oik oin oio oir oiu okb okg oki okk oko okr oku on- onb ong oni onk onn ono onr onu oo- oob oog ooi ook oon ooo oor or- orb org ori ork orn oro orr oru ou- oui ouk oun ouo our rbb rbg rbi rbk rbn rbo rbr rbu rgb rgg rgi rgk rgn rgo rgr rib rig rii rik rin rio rir rkb rkg rkk rko rku rnb rng rni rnn rno rnr rnu rob rog roi rok ron roo ror rou rrb rrg rri rrk rrn rrr rru rub rug rui ruk run ruo rur ruu ubb ubg ubi ubk ubn ubo ubr ubu ugb ugg ugi ugk ugn ugo ugr ugu uib uig uii uin uio uir uiu ukb uki ukk ukn ukr uku un- unb ung uni unk unn uno unr unu uob uog uok uon uoo uor ur- urb urg uri urk urn uro urr uru uug uun uur uuu