b-u bbb bbd bbi bbn bbo bbr bbt bbu bdb bdd bdi bdo bdr bdt bdu bi- bib bid bii bin bio bir bit biu bnb bnd bni bnn bno bnr bnt bnu bob bod boi bon boo bor bot bou brb brd bri brn bro brr brt bru btb btd bti btn bto btr btt btu bub bud bui bun buo bur but buu dbb dbd dbi dbn dbo dbr dbt dbu ddb ddd ddi ddn ddo ddr ddt ddu di- dib did dii din dio dir dit diu dnb dnd dni dnn dno dnr dnt dob dod doi don doo dor dot dou drb drd dri drn dro drr drt dru dtb dtd dti dtn dto dtr dtt dtu dub dud dui dun duo dur dut i-d ibb ibd ibi ibn ibo ibr ibt ibu idb idd idi idn ido idr idt idu iib iid iii iin iio iir iit iiu in- inb ind ini inn ino inr int inu io- iob iod ioi ion ioo ior iot iou ir- irb ird iri irn iro irr irt iru itb itd iti itn ito itt itu iu- iub iud iui iur iut n-i nbb nbd nbi nbn nbo nbr nbt nbu ndb ndd ndi ndn ndo ndr ndt ndu nib nid nii nin nio nir nit niu nnb nni nnn nno nnt nnu no- nob nod noi non noo nor not nou nrb nrd nri nrn nro nrr nrt nru ntb ntd nti ntn nto ntr ntt ntu nub nud nui nun nuo nur nut nuu o-i ob- obb obd obi obn obo obr obt obu odb odd odi odn odo odr odt odu oib oid oii oin oio oir oit oiu on- onb ond oni onn ono onr ont onu oo- oob ood ooi oon ooo oor oot or- orb ord ori orn oro orr ort oru ot- otb otd oti otn oto otr ott otu ou- oud oui oun ouo our out rbb rbd rbi rbn rbo rbr rbt rbu rdb rdd rdi rdn rdo rdr rdt rdu rib rid rii rin rio rir rit rnb rnd rni rnn rno rnr rnt rnu rob rod roi ron roo ror rot rou rrb rrd rri rrn rrr rrt rru rtb rtd rti rtn rto rtr rtt rtu rub rud rui run ruo rur rut ruu tbb tbd tbi tbn tbo tbr tbt tbu tdb tdd tdi tdn tdo tdr tdt tdu tib tid tii tin tio tir tit tiu tnb tnd tni tnn tno tnr tnt to- tob tod toi ton too tor tot tou trb trd tri trn tro trr trt tru ttb ttd tti ttn tto ttr ttt ttu tub tud tui tun tuo tur tut tuu ubb ubi ubn ubo ubr ubt ubu udb udd udi udn udo udr udt udu uib uid uii uin uio uir uit uiu un- unb und uni unn uno unr unt unu uob uod uon uoo uor uot ur- urb urd uri urn uro urr urt uru utb utd uti utn uto utr utt utu uun uur uut uuu