-er b-u bbb bbd bbe bbi bbn bbo bbr bbu bdb bdd bde bdi bdo bdr bdu be- beb bed bee bei ben beo ber beu bi- bib bid bie bii bin bio bir biu bnb bnd bne bni bnn bno bnr bnu bob bod boe boi bon boo bor bou brb brd bre bri brn bro brr bru bub bud bue bui bun buo bur buu dbb dbd dbe dbi dbn dbo dbr dbu ddb ddd dde ddi ddn ddo ddr ddu de- deb ded dee dei den deo der deu di- dib did die dii din dio dir diu dnb dnd dne dni dnn dno dnr dob dod doe doi don doo dor dou drb drd dre dri drn dro drr dru dub dud due dui dun duo dur ebb ebd ebe ebi ebn ebo ebr ebu ed- edb edd ede edi edn edo edr edu eeb eed eee een eeo eer eib eid eie eii ein eio eir eiu en- enb end ene eni enn eno enr enu eo- eob eod eoe eoi eon eoo eor eou erb erd ere eri ern ero err eru eu- eub eud eue eui eun eur i-d ibb ibd ibe ibi ibn ibo ibr ibu idb idd ide idi idn ido idr idu ie- ied iee iei ien ier iib iid iie iii iin iio iir iiu in- inb ind ine ini inn ino inr inu io- iob iod ioe ioi ion ioo ior iou ir- irb ird ire iri irn iro irr iru iu- iub iud iue iui iur n-i nbb nbd nbe nbi nbn nbo nbr nbu ndb ndd nde ndi ndn ndo ndr ndu ne- neb ned nee nei nen neo ner neu nib nid nie nii nin nio nir niu nnb nne nni nnn nno nnu no- nob nod noe noi non noo nor nou nrb nrd nre nri nrn nro nrr nru nub nud nue nui nun nuo nur nuu o-i ob- obb obd obe obi obn obo obr obu odb odd ode odi odn odo odr odu oeb oed oee oei oen oeo oer oib oid oie oii oin oio oir oiu on- onb ond one oni onn ono onr onu oo- oob ood ooi oon ooo oor or- orb ord ore ori orn oro orr oru ou- oud oue oui oun ouo our rbb rbd rbe rbi rbn rbo rbr rbu rdb rdd rde rdi rdn rdo rdr rdu re- reb red ree rei ren reo rer reu rib rid rie rii rin rio rir rnb rnd rni rnn rno rnr rnu rob rod roe roi ron roo ror rou rrb rrd rri rrn rrr rru rub rud rue rui run ruo rur ruu ubb ube ubi ubn ubo ubr ubu udb udd ude udi udn udo udr udu ueb ued uee uei uen uer uib uid uie uii uin uio uir uiu un- unb und une uni unn uno unr unu uob uod uoe uon uoo uor ur- urb urd ure uri urn uro urr uru uue uun uur uuu