-er bbb bbd bbe bbi bbk bbn bbo bbr bdb bdd bde bdi bdk bdo bdr bdv be- beb bed bee bei bek ben beo ber bev bi- bib bid bie bii bik bin bio bir biv bkb bke bkk bkn bko bkr bkv bnb bnd bne bni bnk bnn bno bnr bnv bob bod boe boi bok bon boo bor bov brb brd bre bri brk brn bro brr brv bvb bvd bve bvi bvk bvn bvo bvr bvv dbb dbd dbe dbi dbk dbn dbo dbr dbv ddb ddd dde ddi ddk ddn ddo ddr de- deb ded dee dei dek den deo der dev di- dib did die dii dik din dio dir div dkb dke dki dkk dko dkr dnb dnd dne dni dnk dnn dno dnr dob dod doe doi dok don doo dor dov drb drd dre dri drk drn dro drr drv dvb dvd dve dvi dvk dvn dvr ebb ebd ebe ebi ebk ebn ebo ebr ebv ed- edb edd ede edi edk edn edo edr eeb eed eee eek een eeo eer eev eib eid eie eii eik ein eio eir eiv ekb ekd eke eki eko ekr ekv en- enb end ene eni enk enn eno enr env eo- eob eod eoe eoi eok eon eoo eor erb erd ere eri erk ern ero err erv evb evd eve evi evn evo evr evv i-d i-v ibb ibd ibe ibi ibk ibn ibo ibr ibv idb idd ide idi idk idn ido idr idv ie- ied iee iei iek ien ier iev iib iid iie iii iin iio iir ikb ike iki ikk iko ikr ikv in- inb ind ine ini ink inn ino inr inv io- iob iod ioe ioi ion ioo ior iov ir- irb ird ire iri irk irn iro irr irv ivb ivd ive ivi ivo ivr ivv kbb kbd kbe kbi kbk kbn kbo kbr kdb kde kdk kdo kdr ke- keb ked kee kei kek ken keo ker kev kib kid kie kii kik kin kio kir kiv kkb kke kki kkk kkn kkr kkv kn- knd kne kni knk knn kno knr kob kod koe koi kok kon koo kor krd kri krk krn kro krr krv kvb kvi kvk kvn kvo kvr kvv n-i nbb nbd nbe nbi nbk nbn nbo nbr nbv ndb ndd nde ndi ndk ndn ndo ndr ndv ne- neb ned nee nei nek nen neo ner nev nib nid nie nii nik nin nio nir niv nke nki nkk nkn nko nkr nnb nne nni nnk nnn nno nnv no- nob nod noe noi nok non noo nor nov nrb nrd nre nri nrk nrn nro nrr nrv nvb nvd nve nvi nvk nvn nvv o-i ob- obb obd obe obi obk obn obo obr obv odb odd ode odi odn odo odr odv oeb oed oee oei oen oeo oer oib oid oie oii oik oin oio oir oiv okb okd oke oki okk oko okr on- onb ond one oni onk onn ono onr oo- oob ood ooi ook oon ooo oor oov or- orb ord ore ori ork orn oro orr orv ov- ovb ovd ove ovi ovo ovv rbb rbd rbe rbi rbk rbn rbo rbr rdb rdd rde rdi rdn rdo rdr rdv re- reb red ree rei rek ren reo rer rev rib rid rie rii rik rin rio rir riv rkb rke rkk rko rkv rnb rnd rni rnn rno rnr rnv rob rod roe roi rok ron roo ror rov rrb rrd rri rrk rrn rrr rvb rvd rve rvi rvn rvo rvr rvv v-e vbd vbi vbk vbo vbr vbv vdb vdd vde vdi vdk vdo vdr vdv veb ved vee vei vek ven veo ver vi- vib vid vie vii vik vin vio vir viv vkb vn- vnd vni vno vnr vnv vob vod voe voi vok von voo vor vov vrb vrd vre vri vrk vrn vrr vvb vvi vvo vvr vvv