b-u bbb bbi bbn bbo bbr bbt bbu bi- bib bii bin bio bir bit biu bnb bni bnn bno bnr bnt bnu bob boi bon boo bor bot bou brb bri brn bro brr brt bru btb bti btn bto btr btt btu bub bui bun buo bur but buu ibb ibi ibn ibo ibr ibt ibu iib iii iin iio iir iit iiu in- inb ini inn ino inr int inu io- iob ioi ion ioo ior iot iou ir- irb iri irn iro irr irt iru itb iti itn ito itt itu iu- iub iui iur iut n-i nbb nbi nbn nbo nbr nbt nbu nib nii nin nio nir nit niu nnb nni nnn nno nnt nnu no- nob noi non noo nor not nou nrb nri nrn nro nrr nrt nru ntb nti ntn nto ntr ntt ntu nub nui nun nuo nur nut nuu o-i ob- obb obi obn obo obr obt obu oib oii oin oio oir oit oiu on- onb oni onn ono onr ont onu oo- oob ooi oon ooo oor oot or- orb ori orn oro orr ort oru ot- otb oti otn oto otr ott otu ou- oui oun ouo our out rbb rbi rbn rbo rbr rbt rbu rib rii rin rio rir rit rnb rni rnn rno rnr rnt rnu rob roi ron roo ror rot rou rrb rri rrn rrr rrt rru rtb rti rtn rto rtr rtt rtu rub rui run ruo rur rut ruu tbb tbi tbn tbo tbr tbt tbu tib tii tin tio tir tit tiu tnb tni tnn tno tnr tnt to- tob toi ton too tor tot tou trb tri trn tro trr trt tru ttb tti ttn tto ttr ttt ttu tub tui tun tuo tur tut tuu ubb ubi ubn ubo ubr ubt ubu uib uii uin uio uir uit uiu un- unb uni unn uno unr unt unu uob uon uoo uor uot ur- urb uri urn uro urr urt uru utb uti utn uto utr utt utu uun uur uut uuu