-er b-u bbb bbd bbe bbg bbk bbn bbo bbr bbu bdb bdd bde bdg bdk bdo bdr bdu be- beb bed bee beg bek ben beo ber beu bgb bgd bge bgg bgk bgn bgo bgr bgu bkb bke bkg bkk bkn bko bkr bnb bnd bne bng bnk bnn bno bnr bnu bob bod boe bog bok bon boo bor bou brb brd bre brg brk brn bro brr bru bub bud bue bug buk bun buo bur buu dbb dbd dbe dbg dbk dbn dbo dbr dbu ddb ddd dde ddg ddk ddn ddo ddr ddu de- deb ded dee deg dek den deo der deu dgd dge dgg dgk dgn dgr dgu dkb dke dkg dkk dko dkr dku dnb dnd dne dng dnk dnn dno dnr dob dod doe dog dok don doo dor dou drb drd dre drg drk drn dro drr dru dub dud due dug duk dun duo dur ebb ebd ebe ebg ebk ebn ebo ebr ebu ed- edb edd ede edg edk edn edo edr edu eeb eed eee eeg eek een eeo eer egb egd ege egg egn ego egr egu ekb ekd eke ekg eko ekr eku en- enb end ene eng enk enn eno enr enu eo- eob eod eoe eog eok eon eoo eor eou erb erd ere erg erk ern ero err eru eu- eub eud eue eug eun eur g-d gbd gbe gbg gbk gbn gbo gbr gbu gdb gdd gde gdk gdn gdo gdr gdu ge- geb ged gee geg gek gen geo ger geu ggb ggd ggg ggn ggo ggr ggu gkb gkd gkn gko gnb gnd gne gnn gno gnr gnu gob god goe gog gok gon goo gor gou grb grd gre grg grk grn gro grr gru gu- gub gud gue gug guk gun guo gur guu kbb kbd kbe kbk kbn kbo kbr kbu kdb kde kdg kdk kdo kdr kdu ke- keb ked kee keg kek ken keo ker kgb kgd kgo kgu kkb kke kkk kkn kkr kku kn- knd kne kng knk knn kno knr knu kob kod koe kog kok kon koo kor kou krd krg krk krn kro krr kru kub kud kue kug kuk kun kur kuu nbb nbd nbe nbg nbk nbn nbo nbr nbu ndb ndd nde ndg ndk ndn ndo ndr ndu ne- neb ned nee neg nek nen neo ner neu ngb ngd nge ngg ngk ngn ngo ngu nke nkk nkn nko nkr nku nnb nne nng nnk nnn nno nnu no- nob nod noe nog nok non noo nor nou nrb nrd nre nrg nrk nrn nro nrr nru nub nud nue nug nuk nun nuo nur nuu ob- obb obd obe obg obk obn obo obr obu odb odd ode odg odn odo odr odu oeb oed oee oeg oen oeo oer ogd oge ogg ogn ogo okb okd oke okg okk oko okr oku on- onb ond one ong onk onn ono onr onu oo- oob ood oog ook oon ooo oor or- orb ord ore org ork orn oro orr oru ou- oud oue ouk oun ouo our rbb rbd rbe rbg rbk rbn rbo rbr rbu rdb rdd rde rdg rdn rdo rdr rdu re- reb red ree reg rek ren reo rer reu rgb rgd rge rgg rgk rgn rgo rgr rkb rke rkg rkk rko rku rnb rnd rng rnn rno rnr rnu rob rod roe rog rok ron roo ror rou rrb rrd rrg rrk rrn rrr rru rub rud rue rug ruk run ruo rur ruu ubb ube ubg ubk ubn ubo ubr ubu udb udd ude udg udk udn udo udr udu ueb ued uee ueg uen uer ugb uge ugg ugk ugn ugo ugr ugu ukb uke ukk ukn ukr uku un- unb und une ung unk unn uno unr unu uob uod uoe uog uok uon uoo uor ur- urb urd ure urg urk urn uro urr uru uue uug uun uur uuu