-er bbb bbd bbe bbi bbk bbn bbo bbr bdb bdd bde bdi bdk bdo bdr be- beb bed bee bei bek ben beo ber bi- bib bid bie bii bik bin bio bir bkb bke bkk bkn bko bkr bnb bnd bne bni bnk bnn bno bnr bob bod boe boi bok bon boo bor brb brd bre bri brk brn bro brr dbb dbd dbe dbi dbk dbn dbo dbr ddb ddd dde ddi ddk ddn ddo ddr de- deb ded dee dei dek den deo der di- dib did die dii dik din dio dir dkb dke dki dkk dko dkr dnb dnd dne dni dnk dnn dno dnr dob dod doe doi dok don doo dor drb drd dre dri drk drn dro drr ebb ebd ebe ebi ebk ebn ebo ebr ed- edb edd ede edi edk edn edo edr eeb eed eee eek een eeo eer eib eid eie eii eik ein eio eir ekb ekd eke eki eko ekr en- enb end ene eni enk enn eno enr eo- eob eod eoe eoi eok eon eoo eor erb erd ere eri erk ern ero err i-d ibb ibd ibe ibi ibk ibn ibo ibr idb idd ide idi idk idn ido idr ie- ied iee iei iek ien ier iib iid iie iii iin iio iir ikb ike iki ikk iko ikr in- inb ind ine ini ink inn ino inr io- iob iod ioe ioi ion ioo ior ir- irb ird ire iri irk irn iro irr kbb kbd kbe kbi kbk kbn kbo kbr kdb kde kdk kdo kdr ke- keb ked kee kei kek ken keo ker kib kid kie kii kik kin kio kir kkb kke kki kkk kkn kkr kn- knd kne kni knk knn kno knr kob kod koe koi kok kon koo kor krd kri krk krn kro krr n-i nbb nbd nbe nbi nbk nbn nbo nbr ndb ndd nde ndi ndk ndn ndo ndr ne- neb ned nee nei nek nen neo ner nib nid nie nii nik nin nio nir nke nki nkk nkn nko nkr nnb nne nni nnk nnn nno no- nob nod noe noi nok non noo nor nrb nrd nre nri nrk nrn nro nrr o-i ob- obb obd obe obi obk obn obo obr odb odd ode odi odn odo odr oeb oed oee oei oen oeo oer oib oid oie oii oik oin oio oir okb okd oke oki okk oko okr on- onb ond one oni onk onn ono onr oo- oob ood ooi ook oon ooo oor or- orb ord ore ori ork orn oro orr rbb rbd rbe rbi rbk rbn rbo rbr rdb rdd rde rdi rdn rdo rdr re- reb red ree rei rek ren reo rer rib rid rie rii rik rin rio rir rkb rke rkk rko rnb rnd rni rnn rno rnr rob rod roe roi rok ron roo ror rrb rrd rri rrk rrn rrr