-er bbb bbd bbe bbg bbk bbn bbo bbr bdb bdd bde bdg bdk bdo bdr be- beb bed bee beg bek ben beo ber bgb bgd bge bgg bgk bgn bgo bgr bkb bke bkg bkk bkn bko bkr bnb bnd bne bng bnk bnn bno bnr bob bod boe bog bok bon boo bor brb brd bre brg brk brn bro brr dbb dbd dbe dbg dbk dbn dbo dbr ddb ddd dde ddg ddk ddn ddo ddr de- deb ded dee deg dek den deo der dgd dge dgg dgk dgn dgr dkb dke dkg dkk dko dkr dnb dnd dne dng dnk dnn dno dnr dob dod doe dog dok don doo dor drb drd dre drg drk drn dro drr ebb ebd ebe ebg ebk ebn ebo ebr ed- edb edd ede edg edk edn edo edr eeb eed eee eeg eek een eeo eer egb egd ege egg egn ego egr ekb ekd eke ekg eko ekr en- enb end ene eng enk enn eno enr eo- eob eod eoe eog eok eon eoo eor erb erd ere erg erk ern ero err g-d gbd gbe gbg gbk gbn gbo gbr gdb gdd gde gdk gdn gdo gdr ge- geb ged gee geg gek gen geo ger ggb ggd ggg ggn ggo ggr gkb gkd gkn gko gnb gnd gne gnn gno gnr gob god goe gog gok gon goo gor grb grd gre grg grk grn gro grr kbb kbd kbe kbk kbn kbo kbr kdb kde kdg kdk kdo kdr ke- keb ked kee keg kek ken keo ker kgb kgd kgo kkb kke kkk kkn kkr kn- knd kne kng knk knn kno knr kob kod koe kog kok kon koo kor krd krg krk krn kro krr nbb nbd nbe nbg nbk nbn nbo nbr ndb ndd nde ndg ndk ndn ndo ndr ne- neb ned nee neg nek nen neo ner ngb ngd nge ngg ngk ngn ngo nke nkk nkn nko nkr nnb nne nng nnk nnn nno no- nob nod noe nog nok non noo nor nrb nrd nre nrg nrk nrn nro nrr ob- obb obd obe obg obk obn obo obr odb odd ode odg odn odo odr oeb oed oee oeg oen oeo oer ogd oge ogg ogn ogo okb okd oke okg okk oko okr on- onb ond one ong onk onn ono onr oo- oob ood oog ook oon ooo oor or- orb ord ore org ork orn oro orr rbb rbd rbe rbg rbk rbn rbo rbr rdb rdd rde rdg rdn rdo rdr re- reb red ree reg rek ren reo rer rgb rgd rge rgg rgk rgn rgo rgr rkb rke rkg rkk rko rnb rnd rng rnn rno rnr rob rod roe rog rok ron roo ror rrb rrd rrg rrk rrn rrr