-er bbb bbd bbe bbf bbk bbn bbo bbr bdb bdd bde bdf bdk bdo bdr be- beb bed bee bef bek ben beo ber bfb bfd bfe bff bfn bfo bfr bkb bke bkf bkk bkn bko bkr bnb bnd bne bnf bnk bnn bno bnr bob bod boe bof bok bon boo bor brb brd bre brf brk brn bro brr dbb dbd dbe dbf dbk dbn dbo dbr ddb ddd dde ddf ddk ddn ddo ddr de- deb ded dee def dek den deo der dfb dfd dfe dff dfk dfn dfo dfr dkb dke dkk dko dkr dnb dnd dne dnf dnk dnn dno dnr dob dod doe dof dok don doo dor drb drd dre drk drn dro drr ebb ebd ebe ebf ebk ebn ebo ebr ed- edb edd ede edf edk edn edo edr eeb eed eee eef eek een eeo eer ef- efb efd efe eff efo efr ekb ekd eke ekf eko ekr en- enb end ene enf enk enn eno enr eo- eob eod eoe eof eok eon eoo eor erb erd ere erf erk ern ero err fbb fbd fbe fbf fbk fbn fbo fbr fdb fdd fde fdf fdk fdn fdo fdr feb fed fee fef fek fen feo fer ffd ffe fff ffk ffn ffo ffr fkb fkf fkk fnb fnd fne fnf fnk fnn fnr fob foe fof fok fon foo for frb frd fre frf frk frn fro frr kbb kbd kbe kbf kbk kbn kbo kbr kdb kde kdf kdk kdo kdr ke- keb ked kee kef kek ken keo ker kfd kff kfo kkb kke kkk kkn kkr kn- knd kne knf knk knn kno knr kob kod koe kof kok kon koo kor krd krf krk krn kro krr nbb nbd nbe nbf nbk nbn nbo nbr ndb ndd nde ndf ndk ndn ndo ndr ne- neb ned nee nef nek nen neo ner nfb nfd nfe nff nfk nfn nfo nfr nke nkf nkk nkn nko nkr nnb nne nnf nnk nnn nno no- nob nod noe nof nok non noo nor nrb nrd nre nrf nrk nrn nro nrr ob- obb obd obe obf obk obn obo obr odb odd ode odf odn odo odr oeb oed oee oef oen oeo oer of- ofb ofd ofe off ofn ofo ofr okb okd oke okk oko okr on- onb ond one onf onk onn ono onr oo- oob ood oof ook oon ooo oor or- orb ord ore orf ork orn oro orr rbb rbd rbe rbf rbk rbn rbo rbr rdb rdd rde rdf rdn rdo rdr re- reb red ree ref rek ren reo rer rfb rfd rfe rff rfk rfn rfo rfr rkb rke rkf rkk rko rnb rnd rnn rno rnr rob rod roe rof rok ron roo ror rrb rrd rrf rrk rrn rrr